{"title":"Thermionic Valves \/ Vacuum Tubes","description":"\u003cp\u003eThermionic Valves \/ Vacuum Tubes from manufacturers such as; Mullard, GEC, Brimar, RCA, Westinghouse, Zaerix for HiFi and\/or Radio communication applications.\u003c\/p\u003e","products":[{"product_id":"1994-history-of-the-british-radio-valve-to-1940-by-keith-thrower-isbn-0952068400","title":"1994 History Of The British Radio Valve To 1940 By Keith Thrower ISBN 0952068400","description":"\u003ch1\u003e1994 History Of The British Radio Valve To 1940 By Keith Thrower ISBN 0952068400\u003c\/h1\u003e\n\u003cp\u003eThis 1994 \u003cem\u003eHistory Of The British Radio Valve To 1940\u003c\/em\u003e By Keith Thrower ISBN 0952068400, forms an essential part of your vacuum tubes\/valves education. \u003c\/p\u003e\n\u003cp\u003eThe paperback book looks at the history of different manufacturers and types of pre-1940 British Valves (tubes) including their basic principles of operation with supporting technical information, illustrations, monochrome photographs, and schematic diagrams.\u003c\/p\u003e\n\u003cp\u003eThis book is in pretty good condition with some minor discolouration on the edge of the pages; blemishes\/creasing on the spine and edges, and corner bumps.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTitle:  \u003cem\u003eHistory Of The British Radio Valve To 1940\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eAuthor:  Keith R. Thrower\u003c\/li\u003e\n\u003cli\u003ePublished by MMA International Ltd\u003c\/li\u003e\n\u003cli\u003eReprint of the 1992 version with minor corrections (April 1993 and January 1994)\u003c\/li\u003e\n\u003cli\u003eISBN 0952068400\u003c\/li\u003e\n\u003cli\u003eWhite card wrap soft covers: paperback\u003c\/li\u003e\n\u003cli\u003e213 pages, including figures and tables.  8 Chapters and 11 Appendices including a glossary and valve index.\u003c\/li\u003e\n\u003cli\u003eApprox. Size\n\u003cul\u003e\n\u003cli\u003eHeight: 29.8 cm \u003c\/li\u003e\n\u003cli\u003eWidth: 21.2 cm\u003c\/li\u003e\n\u003cli\u003eDepth: 1.4 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe perfect accompaniment to your vintage radio ephemera collection!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-and-collectible-books\" target=\"_blank\"\u003evintage and collectible books\u003c\/a\u003e\u003c\/p\u003e","brand":"Keith Thrower","offers":[{"title":"Default Title","offer_id":42310616547585,"sku":"","price":59.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/1994_History_Of_The_British_Radio_Valve_To_1940_By_Keith_Thrower_ISBN_0952068400.jpg?v=1767354965"},{"product_id":"original-guide-to-valves-semiconductors-and-crystal-by-marconi-marine","title":"Original 1967 Guide To Valves Semiconductors And Crystals By Marconi Marine","description":"\u003ch1\u003eOriginal 1967 Guide To Valves Semiconductors And Crystals By Marconi Marine\u003c\/h1\u003e\n\u003cp\u003eThis Original 1967 \u003cem\u003eGuide To Valves Semiconductors And Crystals\u003c\/em\u003e By Marconi Marine is in good condition and quite informative. It dates to October 1967.\u003c\/p\u003e\n\u003cp\u003eThere is some creasing, slight discolouration on the front cover, and page yellowing.\u003c\/p\u003e\n\u003cp\u003ePublished by:-\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px; text-align: left;\"\u003e\u003cem\u003eTechnical Information Section\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe Marconi International Marine Company Limited\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eElettra House, Chelmsford, Essex\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv\u003eThe catalogue comprises information on e.g.\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eValves and Semiconductors used in Auto-alarms, broadcast, CCTV, Position fixing, Radar, Transmitters, Receivers, Echosounders, VHF\u003c\/li\u003e\n\u003cli\u003eCrystals used in Receivers, Transmitters and VHF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMeasures approximately: 21.8 x 14.5 x 1.0 cm\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/radio-equipment-accessories\" target=\"_blank\"\u003evintage radio accessories.\u003c\/a\u003e\u003c\/p\u003e","brand":"Marconi","offers":[{"title":"Default Title","offer_id":42572306612481,"sku":"","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC04036.jpg?v=1646745530"},{"product_id":"1920s-mo-valve-co-100-watt-army-transmitting-triode-at100","title":"1920s MO Valve Co 100 Watt Army Transmitting Triode AT100","description":"\u003ch1\u003e1920s MO Valve Co 100 Watt Army Transmitting Triode AT100\u003c\/h1\u003e\n\u003cp\u003eThis is a 1920s MO Valve Co 100 Watt Army Transmitting Triode AT100 made by \u003cmeta charset=\"utf-8\"\u003eMarconi-Osram Valve Company Limited \u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eof Brook Green Works, Hammersmith, London.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff2a00;\"\u003eIt is untested and is being sold as a collectible item for display only.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn pretty good cosmetic condition it has no metal top or base caps.\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e100 watt\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eApproximately 23 cm in height and 11 cm diameter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eM.O.V Co. Ltd\u003c\/p\u003e\n\u003cp\u003eGEC Made in England\u003c\/p\u003e\n\u003cp\u003eAT 100\u003c\/p\u003e\n\u003cp\u003e4 \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eA great addition to a collection of vintage tech and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/militaria\" target=\"_blank\" rel=\"noopener noreferrer\"\u003emilitaria. \u003c\/a\u003e\u003c\/p\u003e","brand":"MOV Marconi Osram Valve Company","offers":[{"title":"Default Title","offer_id":43697097441537,"sku":"","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC05646_1.webp?v=1673019315"},{"product_id":"1920s-boxed-tungar-rectifier-valve-made-by-british-thomson-houston-bth","title":"1920s Boxed Tungar Rectifier Valve Made by British Thomson Houston (BTH)","description":"\u003ch1\u003e1920s Boxed Tungar Rectifier Valve Made by British Thomson Houston (BTH)\u003c\/h1\u003e\n\u003cp\u003eThis is a 1920s Boxed Tungar Rectifier Valve Made by British Thomson Houston (BTH).\u003c\/p\u003e\n\u003cp\u003eIn pretty good condition, the valve comes in its original box which is in fairly good condition with storage scuffs and blemishes; it is missing a top flap. \u003cmeta charset=\"utf-8\"\u003eThis valve, (TUNGAR= Tungsten-Argon with a Mogul screw base), has not been tested and is sold as a collectible for display only.\u003c\/p\u003e\n\u003cp\u003eA 2-amp valve made for use with the \u003cem\u003eTungar rectifier and battery charger\u003c\/em\u003e in its original box, and used for charging radios and car batteries from an AC supply: see original 1920s\/30s advert and schematic amongst the images. \u003c\/p\u003e\n\u003cp\u003eMade by BTH The British Thomson-Houston Co. Ltd\u003cspan\u003e based at Crown House, Aldrich, London, WC2, part of the AEI group. T\u003c\/span\u003e\u003cspan\u003ehe patent citations date prior to the 1920s! In 1928, production of the Tungar valve was transferred to Edison Swan Electric company (Ediswan) making this BTH version a rarity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eA nice piece of Electrical history to add to your collection!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-technology-scientific-engineering-imaging-medical-equipment-instruments-tools\" target=\"_blank\" rel=\"noopener noreferrer\"\u003evintage technology.\u003c\/a\u003e\u003c\/p\u003e","brand":"British Thomson Houston (BTH)","offers":[{"title":"Default Title","offer_id":43825057693953,"sku":"","price":29.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC06209_1.jpg?v=1680017371"},{"product_id":"1953-fourth-edition-avo-valve-data-manual","title":"1953 Fourth Edition AVO Valve Data Manual","description":"\u003ch1\u003e1953 Fourth Edition AVO Valve Data Manual\u003c\/h1\u003e\n\u003cp\u003eThis is a 1953 Fourth Edition AVO Valve Data Manual published by AVO: (\u003cstrong\u003eAcweeco\u003c\/strong\u003e: \u003cstrong\u003eA\u003c\/strong\u003eutomatic\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC\u003c\/strong\u003eoil\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eW\u003c\/strong\u003einder And\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE\u003c\/strong\u003electrical\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eE\u003c\/strong\u003equipment\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCo\u003c\/strong\u003e. Ltd).\u003c\/p\u003e\n\u003cp\u003eIn pretty good condition with scuffs, discolouration and a few bumps on the edges commensurate with age and use.\u003c\/p\u003e\n\u003cp\u003eA hardback book comprising 98 pages including valve characteristic meter data for Receiving and Small Transmitting Valves. A wealth of information for the valve enthusiast!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/non-fiction-reference-books\" target=\"_blank\" rel=\"noopener noreferrer\"\u003evintage reference books. \u003c\/a\u003e\u003c\/p\u003e","brand":"AVO (ACWEECO)","offers":[{"title":"Default Title","offer_id":43836024586497,"sku":"","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/IMG_0300.jpg?v=1680526154"},{"product_id":"original-card-instructions-for-operating-an-avo-valve-characteristic-meter","title":"Original Card Instructions For Operating An AVO Valve Characteristic Meter","description":"\u003ch1\u003eOriginal Card Instructions For Operating An AVO Valve Characteristic Meter\u003c\/h1\u003e\n\u003cp\u003eOriginal Card Instructions For Operating An AVO Valve Characteristic Meter. In pretty good condition with discolouration and some surface scuffs and blemishes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Size:-\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWidth 22.8 cm\u003c\/li\u003e\n\u003cli\u003eHeight: 12 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduced by AVO: (\u003cstrong\u003eAcweeco\u003c\/strong\u003e: \u003cstrong\u003eA\u003c\/strong\u003eutomatic\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC\u003c\/strong\u003eoil\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eW\u003c\/strong\u003einder And\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE\u003c\/strong\u003electrical\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eE\u003c\/strong\u003equipment\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCo\u003c\/strong\u003e. Ltd).\u003c\/p\u003e\n\u003cp\u003eA useful accompaniment to your AVO valve tester!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\" rel=\"noopener noreferrer\"\u003evintage valve ephemera.\u003c\/a\u003e\u003c\/p\u003e","brand":"AVO (ACWEECO)","offers":[{"title":"Default Title","offer_id":43836026880257,"sku":"","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/IMG_0306.jpg?v=1680526723"},{"product_id":"1920s-mullard-pm3-radio-triode-valve-in-its-original-box","title":"1920s Mullard PM3 Radio Triode Valve In Its Original Box","description":"\u003ch1\u003e1920s Mullard PM3 Radio Triode Valve In Its Original Box\u003c\/h1\u003e\n\u003cp\u003eThis amazing collectible is a 1920s Mullard PM3 Radio Triode Valve In Its Original Box; where PM stands for Philips-Mullard. \u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eA nice display item for the office or radio shack!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt is nearly 100 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003eit is being sold as a collectible for display only\u003c\/span\u003e. According to \u003cem\u003eThe\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003e History of the British Radio Valve to 1940, \u003c\/em\u003ethe valve was introduced in 1926.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis is an early version of both valve and box. It has its original paper label with the warning \"\u003cspan class=\"c8\"\u003eTHERE IS NO GLOW FROM THIS FILAMENT\u003c\/span\u003e\" and information about the filament voltage and current, and maximum anode voltage. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe early version cardboard box, without the cut out in the lid,  is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal Specification:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mullard Radio Valve Co.Ltd etched on the side in white\u003c\/li\u003e\n\u003cli\u003eType: Universal Vacuum Triode\u003c\/li\u003e\n\u003cli\u003eMarked with the BBC logo and DT06\u003c\/li\u003e\n\u003cli\u003eBase: 4-Pin B4 with a single slot in each pin (split pin)\u003c\/li\u003e\n\u003cli\u003eFilament: \u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eVoltage 3.0-3.7 Volts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eCurrent ~0.1 amps (\u003cspan style=\"color: #2b00ff;\"\u003eNB: The current was reduced to 0.075 amps in later versions) \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eAnode Voltage 50-100 Volts\u003c\/li\u003e\n\u003cli\u003eFor Detection, High or Low Frequency Amplification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003evintage valves\u003c\/a\u003e and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" target=\"_blank\"\u003eradio ephemera\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":43882815029505,"sku":"","price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1920s_Mullard_PM3_Radio_Triode_Valve_In_Its_Original_Box_2.jpg?v=1761572272"},{"product_id":"1920s-mullard-pm1-lf-radio-valve-in-its-original-box","title":"1920s Mullard PM1 LF Radio Triode Valve In Its Original Box","description":"\u003ch1\u003e1920s Mullard PM1 LF Radio Triode Valve In Its Original Box\u003c\/h1\u003e\n\u003cp\u003eThis amazing collectible is a 1920s Mullard PM1 LF Radio Triode Valve In Its Original Box; where PM stands for Philips-Mullard. It is a dull emittter low frequency amplifier for use with a 2volt accumulator. \u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eA nice display item for the office or radio shack!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt is nearly 100 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, it is being sold as a collectible for display only. According to \u003cem\u003eThe\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003e History of the British Radio Valve to 1940, \u003c\/em\u003ethe valve was first introduced in 1926.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis is a late 1920s version of both valve and box. It has its original paper label with the warning \"\u003cspan class=\"c8\"\u003eTHERE IS PRACTICALLY NO GLOW FROM THIS FILAMENT\u003c\/span\u003e\" and information about the filament voltage and current, and maximum anode voltage. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe cardboard box, with the cut out in the lid, is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible. It comes with its original technical leaflet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal Specification:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mullard Radio Valve Co.Ltd etched on the side in white\u003c\/li\u003e\n\u003cli\u003eType: Triode Valve \u003cmeta charset=\"utf-8\"\u003eFor Low Frequency Amplification and Detection\u003c\/li\u003e\n\u003cli\u003eMarked with BVA and C18\u003c\/li\u003e\n\u003cli\u003eBase: 4-Pin B4 with a single slot in each pin \u003c\/li\u003e\n\u003cli\u003eFilament: \u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eVoltage 2.0 Volts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eCurrent ~0.1 amps \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eAnode Voltage 50-100 Volts\u003c\/li\u003e\n\u003c\/ul\u003e\nPlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003evintage valves\u003c\/a\u003e and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" target=\"_blank\"\u003eradio ephemera\u003c\/a\u003e\u003cbr\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":43893673001217,"sku":"","price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1920s_Mullard_PM1_LF_Radio_Triode_Valve_In_Its_Original_Box.jpg?v=1771506862"},{"product_id":"copy-of-1920s-mullard-pm3-radio-triode-valve-in-its-original-box","title":"1920s Mullard PM3 Radio Triode Valve In Its Original Box","description":"\u003ch1\u003e1920s Mullard PM3 Radio Triode Valve In Its Original Box\u003c\/h1\u003e\n\u003cp\u003eThis amazing collectible is a late 1920s Mullard PM3 Radio Triode Valve In Its Original Box; where PM stands for Philips-Mullard. A nice display item for the office or radio shack!\u003c\/p\u003e\n\u003cp\u003eIt is over 90 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003eit is being sold as a collectible for display only.\u003c\/span\u003e According to \u003cem\u003eThe\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003e History of the British Radio Valve to 1940, \u003c\/em\u003ethe valve was introduced in 1926.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis is a late 1920s version of both valve and box. It has its original paper label with the warning \"\u003cspan class=\"c8\"\u003eTHERE IS PRACTICALLY NO GLOW FROM THIS FILAMENT\u003c\/span\u003e\" and information about the filament voltage and current, and maximum anode voltage. An early owner has handwritten some test data on the paper label in 1931 and 1933. It also comes with its technical leaflet.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe cardboard box, without the cut out in the lid for the valve pins, is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal Specification:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mullard Radio Valve Co.Ltd etched on the side in white with the series no. D218\u003c\/li\u003e\n\u003cli\u003eType: Universal Vacuum Triode\u003c\/li\u003e\n\u003cli\u003eMarked with the BBC logo on the side\u003c\/li\u003e\n\u003cli\u003eBase: 4-Pin B4 with tubular pins with two slots\u003c\/li\u003e\n\u003cli\u003eFilament: \u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eMaximum Voltage 4 Volts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eCurrent ~0.075 amps (\u003cspan style=\"color: #2b00ff;\"\u003eNB: The current was reduced to from 0.1 to 0.075 amps in the late 1920s versions) \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eAnode Voltage 150 Volts\u003c\/li\u003e\n\u003cli\u003eFor Detection, High or Low Frequency Amplification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003evintage valves\u003c\/a\u003e and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" target=\"_blank\"\u003eradio ephemera\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":43946276389121,"sku":"","price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1920s_Mullard_PM3_Radio_Triode_Valve_In_Its_Original_Box.jpg?v=1761571773"},{"product_id":"stc-3j-160e-military-transmitting-triode-valve-cv2245-kb-f","title":"STC 3J\/160E Military Transmitting Triode Valve CV2245 KB\/F","description":"\u003ch1\u003eSTC 3J\/160E Military Transmitting Triode Valve CV2245 KB\/F\u003c\/h1\u003e\n\u003cp\u003eThis is an air cooled STC 3J\/160E Army Transmitting Triode Valve CV2245 KB\/F made in England by STC (Standard Telephone Cable).\u003c\/p\u003e\n\u003cp\u003eIt is new old stock and still in its original transit box with foam interior.\u003cstrong\u003e\u003cspan style=\"color: #ff2a00;\"\u003e It is untested and is being sold as a collectible item for display only.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eApproximately 12.6 cm (5\") in height and 6.3 cm (2.5\") diameter.\u003c\/p\u003e\n\u003cp\u003eIn excellent cosmetic condition, this 6-pin base triode was capable of accepting a maximum input of 1kW at 120MHz.\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eMarked:-\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSTC\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e3J\/160E\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eMade in England\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e7045\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eCV2245\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eMilitary Arrow\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eKB\/F\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003ePin Function:-\u003c\/p\u003e\n\u003cp\u003e1 Filament centre tap (red tip) \u003cbr\u003e2 Grid \u003cbr\u003e3 Filament \u003cbr\u003e4 Grid \u003cbr\u003e5 Filament \u003cbr\u003e6 Grid Body Anode\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003eFilament voltage 10V\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eFilament current 29A\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax anode voltage 3kV\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax anode dissipation 1kW\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax anode current 2.2A\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eAmplification factor * 19 Max grid dissipation 75W\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eAnode impedance * 1300 ohms\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax operating frequency 120MHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e * At Va=2kV, Ia=500mA\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eA great addition to a collection of vintage tech and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/militaria\" target=\"_blank\"\u003emilitaria. \u003c\/a\u003e\u003c\/p\u003e","brand":"STC Standard Telephone Cable","offers":[{"title":"Default Title","offer_id":44040129151233,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/DSC07351_f967551b-1c39-497a-87c1-0cd552a3109c.jpg?v=1697128536"},{"product_id":"1930s-mullard-pm12a-metallised-screened-grid-valve-in-its-original-box","title":"1930s Mullard PM12A Metallised Screened Grid Valve In Its Original Box","description":"\u003ch1\u003e1930s Mullard PM12A Metallised Screened Grid Valve In Its Original Box\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThis amazing collectible is a 1930s Mullard PM12A Metallised Screened Grid Valve In Its Original Box; where PM stands for Philips-Mullard. \u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eA nice display item for the office or radio shack!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt is nearly 100 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, it is being sold as a collectible for display only. According to \u003cem\u003eThe\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003e History of the British Radio Valve to 1940, \u003c\/em\u003ethe valve was introduced in 1935.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis is an early version of the valve with a bakelite top cap. \u003c\/span\u003eThe cardboard box, with the cut out in the lid, is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal Specification:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mullard Radio Valve Co.Ltd \u003c\/li\u003e\n\u003cli\u003eType: Metallised Screened Grid Tetrode Valve PM12A (where A = high slope) with a top cap terminal\u003c\/li\u003e\n\u003cli\u003eMarked with the BVA logo\u003c\/li\u003e\n\u003cli\u003eBakelite Base: 4-Pin B4 with a single slot in each pin (split pin)\u003c\/li\u003e\n\u003cli\u003eFilament: \u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eVoltage 2.0 Volts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eCurrent ~0.18 amps \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eAnode Voltage 150 Volts\u003c\/li\u003e\n\u003cli\u003eFor High Frequency Amplification\u003c\/li\u003e\n\u003c\/ul\u003e\nPlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003evintage valves\u003c\/a\u003e and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" target=\"_blank\"\u003eradio ephemera\u003c\/a\u003e\u003cbr\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":44173627162881,"sku":null,"price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1930s_Mullard_PM12A_Metallised_Screened_Grid_Valve_In_Its_Original_Box.jpg?v=1761572473"},{"product_id":"vintage-brimar-18d3-production-sample-thermionic-valve-serial-number-015","title":"Vintage Brimar 18D3 Production Sample Thermionic Valve Serial Number 015","description":"\u003ch1 class=\"h2\" itemprop=\"name\"\u003eVintage Brimar 18D3 Production Sample Thermionic Valve Serial Number 015\u003c\/h1\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003eOn offer today we have a very rare survivor in the form of a Vintage Brimar 18D3 Production Sample Thermionic Valve Serial Number 015 made at the Brimsdown plant.\u003c\/p\u003e\n\u003cp\u003eIn excellent boxed cosmetic condition, the valve still sports its original, and vibrant, yellow and red production sample label hand-written with 18D3 and Ser. 015. As you may have noticed, the base has nine pins which are covered with a base plate.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong\u003eApproximate size\u003c\/strong\u003e: 5.5 cm x 2.0 cm \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cmeta charset=\"UTF-8\"\u003eBrimar ECF804 = 18D3= CV5948 triode pentode valve \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eA nice little collectible which we are selling untested as a display item only.\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003eThermionic Valves \/ Tubes. \u003c\/a\u003e\n\u003c\/div\u003e","brand":"Brimar","offers":[{"title":"Default Title","offer_id":44420517232897,"sku":null,"price":12.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/DSC08491_d6756264-048c-4114-ba66-0dfe9fd31c72.jpg?v=1706889863"},{"product_id":"set-of-four-ww2-german-telefunken-thermionic-valves","title":"Set of Four WW2 German Telefunken Thermionic Valves","description":"\u003ch1\u003eSet of Four WW2 German Telefunken Thermionic Valves\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThis is a Set of Four WW2 German Telefunken Thermionic Valves; two labelled LS50 and two with obscured labels but are probably RV2 4P700.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThey haven't been tested and are sold as a collectible, for display only. The getter has turned white in one of the smaller valves.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe larger LS50, transmitter pentodes, were used in German WW2 portable shortwave transmitters such as the \u003cem\u003eRS-20\/M\u003c\/em\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe smaller valves,  RV2 4P 700, were used in, for example, the \u003cem\u003eGurtelpeiler\u003c\/em\u003e, a WW2 portable radio direction finder.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease click on the following link for more vintage militaria.\u003c\/span\u003e\u003c\/p\u003e\n\u003cthe g=\"\" radio=\"\" detection=\"\" is=\"\" a=\"\" superheterodyne=\"\" build=\"\" around=\"\" valves=\"\" x=\"\" rv2=\"\" p-700=\"\" and=\"\" span=\"\"\u003e\u003cbr\u003e\u003c\/the\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":44831135990017,"sku":"","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/DSC08909.jpg?v=1712762213"},{"product_id":"1954-availability-classification-of-marconi-valves-and-electronic-tubes-booklet","title":"1954 Availability Classification Of Marconi Valves And Electronic Tubes Booklet","description":"\u003ch1\u003e1954 Availability Classification Of Marconi Valves And Electronic Tubes Booklet\u003c\/h1\u003e\n\u003cp\u003eThis rare little booklet is a 1954 Availability Classification Of Marconi Valves And Electronic Tubes Booklet\u003c\/p\u003e\n\u003cp\u003eComprising 18 pages, the instruction book is intact but has yellowed with age and is slightly grubby with some foxing. Someone has left a footprint on the face of the booklet!\u003c\/p\u003e\n\u003cp\u003eOriginally owned by the Technical College, Brighton, it was provided by Marconi's Wireless Telegraph Co. Ltd to guide radio designers as to the availability of Marconi valves in 1954. A CV list was provided and other manufacturers' equivalents.\u003c\/p\u003e\n\u003cp\u003eApproximate Size (Width, Height): 15.4 x 22.5 cm\u003c\/p\u003e\n\u003cp\u003eA nice piece of \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eearly radio broadcasting history!\u003c\/a\u003e\u003c\/p\u003e","brand":"Marconi","offers":[{"title":"Default Title","offer_id":45123831070977,"sku":null,"price":8.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1954_Availability_Classification_Of_Marconi_Valves_And_Electronic_Tubes_Booklet.jpg?v=1761315860"},{"product_id":"ww2-wireless-set-ws-19-ws22-case-with-spare-valves-no-4g-za-22935","title":"WW2 Wireless Set WS 19 \/ WS22 Case With Spare Valves No. 4G ZA 22935","description":"\u003ch1\u003eWW2 Wireless Set WS 19 \/ WS22 Case With Spare Valves No. 4G ZA 22935\u003c\/h1\u003e\n\u003cp\u003eA WW2 Wireless Set WS 19 \/ WS22 Case With Spare Valves No. 4G ZA 22935 in fairly good condition. The inside of the lid is missing its valve contents schematic (see insert below), and the tin is a bit rusty with missing paint and has scuffs and blemishes.\u003c\/p\u003e\n\u003cp\u003eContaining a full complement of WS19 valves in the top and bottom inside case, which is lifted out via the canvas strap, as follows:-\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eATS25 x1\u003c\/li\u003e\n\u003cli\u003e6K8G x2\u003c\/li\u003e\n\u003cli\u003e6B8G x2\u003c\/li\u003e\n\u003cli\u003e6K7G x1\u003c\/li\u003e\n\u003cli\u003eCV6 (E1148) x2\u003c\/li\u003e\n\u003cli\u003eEF50 (ARP35) x 1\u003c\/li\u003e\n\u003cli\u003eEB34 (ARDD5) x 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Case Size (WHD)\u003c\/strong\u003e:-  15.4 x 17 x 15 cm \u003c\/p\u003e\n\u003cp\u003eA perfect accessory for your WS19 or WS22!\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"343\" width=\"338\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/WS19_WS22SpareVa_vesCase4G.jpg?v=1716993587\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca rel=\"noopener\" href=\"https:\/\/mullardantiques.co.uk\/collections\/militaria\" target=\"_blank\"\u003emilitaria \u003c\/a\u003eor \u003ca rel=\"noopener\" href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-military-radio-equipment\" target=\"_blank\"\u003emilitary radio ephemera\u003c\/a\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"British Army","offers":[{"title":"Default Title","offer_id":45218161983745,"sku":"","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/DSC09308.jpg?v=1716993588"},{"product_id":"1965-seventeenth-edition-avo-valve-data-manual","title":"1965 Seventeenth Edition AVO Valve Data Manual","description":"\u003ch1\u003e1965 Seventeenth Edition AVO Valve Data Manual\u003c\/h1\u003e\n\u003cp\u003eThis is a 1965 Seventeenth Edition AVO Valve Data Manuall published by AVO: (\u003cstrong\u003eAcweeco\u003c\/strong\u003e: \u003cstrong\u003eA\u003c\/strong\u003eutomatic\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC\u003c\/strong\u003eoil\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eW\u003c\/strong\u003einder And\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE\u003c\/strong\u003electrical\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eE\u003c\/strong\u003equipment\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCo\u003c\/strong\u003e. Ltd).\u003c\/p\u003e\n\u003cp\u003eIn pretty good condition with scuffs, discolouration and a few bumps on the edges commensurate with age and use. The manual was used at the Transmitter Development Test Equipment Section of \u003cem\u003eMarconi\u003c\/em\u003e, Chelmsford.\u003c\/p\u003e\n\u003cp\u003eA hardback book comprising 162 pages including valve characteristic meter data for Receiving and Small Transmitting Valves. A wealth of information for the valve enthusiast!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/non-fiction-reference-books\" rel=\"noopener noreferrer\" target=\"_blank\"\u003evintage reference books. \u003c\/a\u003e\u003c\/p\u003e","brand":"AVO (ACWEECO)","offers":[{"title":"Default Title","offer_id":45471025856769,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/DSC09794.jpg?v=1722435995"},{"product_id":"stc-4h-182e-military-transmitting-tetrode-valve-cv1883","title":"STC 4H\/182E Military Transmitting Tetrode Valve CV1883","description":"\u003ch1\u003eSTC 4H\/182E Military Transmitting Tetrode Valve CV1883\u003c\/h1\u003e\n\u003cp\u003eThis is an air cooled STC 4H\/182E Military Transmitting Tetrode Valve CV1883 made in England by STC (Standard Telephone Cable).\u003c\/p\u003e\n\u003cp\u003eIt is new old stock and still in its original transit box.\u003cstrong\u003e\u003cspan style=\"color: #ff2a00;\"\u003e It is untested and is being sold as a collectible item for display only.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eApproximately 14 cm in height and 8.6 cm diameter.\u003c\/p\u003e\n\u003cp\u003eIn excellent cosmetic condition, this 8-pin base tetrode was capable of accepting a maximum input of 110MHz. Dates to the 1950s.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eMarked:-\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSTC\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eCV 1883\u003cbr\u003e\u003cem\u003e4H\/182E\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eMade in England\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eAM Ref No. 10CV\/1883\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eMilitary Arrow\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eSerial No. 157 QY\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003ePin Function:-\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eFilament 1\u003c\/li\u003e\n\u003cli\u003eGrid \u003c\/li\u003e\n\u003cli\u003eFilament 2\u003c\/li\u003e\n\u003cli\u003eGrid \u003c\/li\u003e\n\u003cli\u003eFilament 1\u003c\/li\u003e\n\u003cli\u003eGrid\u003c\/li\u003e\n\u003cli\u003eFilament 2\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGrid\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eShell around the base = Screen grid\u003c\/p\u003e\n\u003cp\u003eFinned Radiator = Anode\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003eFilament voltage 5V\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eFilament current 22.5A\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax anode voltage 2kV\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax anode dissipation 330W\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax anode current 300mA\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax grid dissipation 20W\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eMax operating frequency 110MHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e * At Va=1kV, Vg2=500V, VG1=-30V\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eA great addition to a collection of vintage tech and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/militaria\" target=\"_blank\"\u003emilitaria. \u003c\/a\u003e\u003c\/p\u003e","brand":"STC Standard Telephone Cable","offers":[{"title":"Default Title","offer_id":45581337624833,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/STC_4H_182E_Military_Transmitting_Tetrode_Valve_CV1883.jpg?v=1736589761"},{"product_id":"1949-mullard-valve-and-service-reference-manual-first-edition-second-impression","title":"1949 Mullard Valve And Service Reference Manual. First Edition Second Impression","description":"\u003ch1\u003e1949 Mullard Valve And Service Reference Manual. First Edition Second Impression\u003c\/h1\u003e\n\u003cp\u003eThis is a 1949 Mullard Valve And Service Reference Manual. First Edition Second Impression in fair condition with scuffs, discolouration, foxing ,and a few bumps on the edges commensurate with age and use. It has also been annotated by a previous owner on the back pages.\u003c\/p\u003e\n\u003cp\u003eApproximate Size (WHD):- 14 x 20.5 x 1.0cm\u003c\/p\u003e\n\u003cp\u003eA spiral ring bound large pocket-size book comprising 221 pages, (12 chapters), of valve characteristic meter data for various types of Receiving and Transmitting Valves from; pentodes, rectifiers, oscilloscope tubes, frequency changers, and a section on general technical data. A wealth of information for the valve enthusiast!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/non-fiction-reference-books\" rel=\"noopener noreferrer\" target=\"_blank\"\u003evintage reference books. \u003c\/a\u003e\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":55800520769911,"sku":null,"price":19.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1949_Mullard_Valve_And_Service_Reference_Manual._First_Edition_Second_Impression.jpg?v=1758278105"},{"product_id":"1940-avo-valve-tester-instructions-and-valve-data-charts-booklets","title":"1940 AVO Valve Tester Instructions And Valve Data Charts Booklets","description":"\u003ch1\u003e1940 AVO Valve Tester Instructions And Valve Data Charts Booklets\u003c\/h1\u003e\n\u003cp\u003eThese are original, rare, 1940 AVO Valve Tester Instructions And Valve Data Charts Booklets published by AVO: (\u003cstrong\u003eAcweeco\u003c\/strong\u003e: \u003cstrong\u003eA\u003c\/strong\u003eutomatic\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC\u003c\/strong\u003eoil\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eW\u003c\/strong\u003einder And\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE\u003c\/strong\u003electrical\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eE\u003c\/strong\u003equipment\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCo\u003c\/strong\u003e. Ltd).\u003c\/p\u003e\n\u003cp\u003eIn fair condition with scuffs, discolouration, stains, and a few bumps on the edges commensurate with age and use. \u003c\/p\u003e\n\u003cp\u003eTwo small soft back \/ paperback booklets: -\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe AVO Valve Tester Valve Data Charts 1940\u003c\/strong\u003e: comprising 22 pages of chart data for Valves including Marconi , Mullard, Mazda and some American 'tubes.' Approximate Size: 21.6 x 14 x 0.3cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstructions for using the AVO Valve Tester\u003c\/strong\u003e: this is for the two panel Mk1 AVO valve tester dating to the late 1930s\/early 1940s. Booklet consists of 8 pages. Approx. Size 18.5 x 12.2 x 0.2cm\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eA wealth of information for the 1940 \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-preowned-amateur-radio-equipment\" rel=\"noopener\" target=\"_blank\"\u003eAVO valve tester and valve enthusiast\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/non-fiction-reference-books\" rel=\"noopener noreferrer\" target=\"_blank\"\u003evintage reference books. \u003c\/a\u003e\u003c\/p\u003e","brand":"AVO (ACWEECO)","offers":[{"title":"Default Title","offer_id":55876026138999,"sku":null,"price":15.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1940_AVO_Valve_Tester_Instructions_And_Valve_Data_Charts_Booklet.jpg?v=1759492979"},{"product_id":"1920s-mullard-pm26-radio-pentone-valve-in-its-original-box","title":"1920s Mullard PM26 Radio Pentone Valve In Its Original Box","description":"\u003ch1\u003e1920s Mullard PM26 Radio Pentone Valve In Its Original Box\u003c\/h1\u003e\n\u003cp\u003eThis amazing collectible is a 1920s Mullard PM26 Radio Pentone Valve In Its Original Box; where PM stands for Philips-Mullard. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eA nice display item for the office or radio shack!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt is nearly 100 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003eit is being sold as a collectible for display only\u003c\/span\u003e. \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis Pentone valve has its original paper label with the warning \"\u003cspan class=\"c8\"\u003eTHERE IS NO GLOW FROM THIS FILAMENT\u003c\/span\u003e\" and information about the filament voltage and current, and maximum anode voltage. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe cardboard box is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal Specification:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mullard Radio Valve Co.Ltd etched on the side in white\u003c\/li\u003e\n\u003cli\u003eType: Pentone\u003c\/li\u003e\n\u003cli\u003ePatent B149\u003c\/li\u003e\n\u003cli\u003eBase: 4-Pin B4 with a single slot in each pin (split pin)\u003c\/li\u003e\n\u003cli\u003eFilament: \u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVoltage 6.0 Volts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCurrent ~0.17 amps \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eAnode Voltage 150 Volts\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003evintage valves\u003c\/a\u003e and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" target=\"_blank\"\u003eradio ephemera\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":56070495338871,"sku":null,"price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1920s_Mullard_PM26_Radio_Pentone_Valve_In_Its_Original_Box.jpg?v=1761745323"},{"product_id":"1960s-avo-valve-characteristic-meter-mark-iv-instruction-manual","title":"1960s AVO Valve Characteristic Meter Mark IV Instruction Manual","description":"\u003ch1\u003e1960s AVO Valve Characteristic Meter Mark IV Instruction Manual\u003c\/h1\u003e\n\u003cp\u003eThis is an original, first edition, 1960s AVO Valve Characteristic Meter Mark IV Instruction Manual, published by AVO Limited, Avocet House, London.\u003c\/p\u003e\n\u003cp\u003eIn pretty good cosmetic condition with scuffs, discolouration and a few bumps on the edges commensurate with age and use. The manual has been annotated by a previous owner and is marked \u003cem\u003eEarith \u003c\/em\u003e(a village in Cambridgeshire), and stamped Received 22 Dec 1969. \u003c\/p\u003e\n\u003cp\u003eA soft back booklet comprising 27 pages of working instructions for an AVO MkIV Valve tester.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Size (WHD):\u003c\/strong\u003e  18 x 23.6 x 0.4cm\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/non-fiction-reference-books\" rel=\"noopener noreferrer\" target=\"_blank\"\u003evintage reference books. \u003c\/a\u003e\u003c\/p\u003e","brand":"AVO (ACWEECO)","offers":[{"title":"Default Title","offer_id":56166611419511,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1960s_AVO_Valve_Characteristic_Meter_Mark_IV_Instruction_Manual.jpg?v=1762955484"},{"product_id":"ericsson-hivac-trochotron-vs10g-cv5290-10-way-beam-switching-tube","title":"Ericsson Hivac Trochotron VS10G \/ CV5290 10-Way Beam Switching Tube","description":"\u003ch1\u003eEricsson Hivac Trochotron VS10G \/ CV5290 10-Way Beam Switching Tube \u003c\/h1\u003e\n\u003cp\u003eThis is a very unusual looking Ericsson Hivac Trochotron VS10G \/ CV5290 10-Way Beam Switching Tube or Beam Switch Counter.\u003c\/p\u003e\n\u003cp\u003eA bright red valve in good cosmetic, but untested, condition being sold as a display item only.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e6.3v at 0.5 Amp heater\u003c\/li\u003e\n\u003cli\u003eEricsson VS10G \/ CV5290 equivalent to Burroughs 6700 divide by ten counter\u003c\/li\u003e\n\u003cli\u003eB26A Base\u003c\/li\u003e\n\u003cli\u003eETL (Etelco)\/ British Ericsson\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\" rel=\"noopener\"\u003evintage valves \/ tubes.\u003c\/a\u003e\u003c\/p\u003e","brand":"Ericsson Hivac","offers":[{"title":"Default Title","offer_id":56196426563959,"sku":null,"price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Ericsson_Hivac_Trochotron_VS10G_CV5290_10-Way_Beam_Switching_Tube.jpg?v=1763397966"},{"product_id":"1930s-cossor-radio-eagle-kings-of-the-air-advertising-figurine-number-285","title":"1930s Cossor Radio Eagle Kings Of The Air Advertising Figurine Number 285","description":"\u003ch1\u003e1930s Cossor Radio Eagle Kings Of The Air Advertising Figurine Number 285\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThis 1930s Cossor Radio Eagle \u003cem\u003eKings Of The Air\u003c\/em\u003e Advertising Figurine Number 285 is almost unique, especially in such lovely original condition. It would have sat on a counter or in a shop window and would have been a real talking point! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eApproximate Size:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeight: 30.6cm (~ 1 foot)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWingspan: 30cm (1 foot)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBase Depth: 16.3cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe Eagle is finely cast from \u003c\/span\u003espelter (smelted zinc) and is perched on top of a rock face constructed from painted Papier-mâché. Considering the base is made from such a delicate substance (paper pulp), its amazing that it has survived in such good condition. It is missing paint and gilding, and there are scuffs\/scratches\/blemishes on the figurine commensurate with age and use. I have tried to show the defects in the images.\u003c\/p\u003e\n\u003cp\u003eVery few of these figurines were manufactured so, if you are lucky enough to find one, they have often been re-gilded and re-painted. This figurine is in original condition.\u003c\/p\u003e\n\u003cp\u003eThis eagle figurine would suit radio historians and collectors as well as eagle lovers and artwork collectors.\u003c\/p\u003e\n\u003cp\u003eThe advertising slogan is centred on the front of the rock face. \u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCOSSOR\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eKINGS OF THE AIR\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eInside the paper mâché base is a manufacturer's label:-\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/DSC08442_240x240.jpg?v=1597324735\" alt=\"\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eA.C.Cossor Ltd\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCossor Works.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eHighbury Grove,\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eLondon N.5\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCOSSOR EAGLE\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNo. 285\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eCossor were instrumental in the advancement of radio and radar. They manufactured equipment ranging from thermionic valves, electronic instruments and, from the 1920s, radio sets.  The original radio sets were sold in kit form under Cossor's new advertising slogan \"Kings Of The Air,\" using an eagle as their logo: see original advertising image (not included).\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/COSSOR_KINGS_OF_AIR_27_480x480.jpg?v=1630147091\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/collectibles-souvenir-commemorative-advertising-merchandising\" target=\"_blank\"\u003eadvertising collectibles\u003c\/a\u003e or \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/radio-equipment-accessories\" target=\"_blank\"\u003eradio related collectibles.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eNB: Accessories are shown for photographic purposes only and are not included in the sale.\u003c\/p\u003e","brand":"Cossor","offers":[{"title":"Default Title","offer_id":56375820452215,"sku":null,"price":189.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/1930s_Cossor_Radio_Eagle_Kings_Of_The_Air_Advertising_Figurine_Number_285.jpg?v=1728404694"},{"product_id":"vintage-5-valve-10-watt-high-quality-amplifier-circuit-technical-book","title":"Vintage 5 Valve 10 Watt High Quality Amplifier Circuit Technical Book","description":"\u003ch1\u003eVintage 5 Valve 10 Watt High Quality Amplifier Circuit Technical Book\u003c\/h1\u003e\n\u003cp\u003eThis is a 1950s Vintage 5 Valve 10 Watt High Quality Amplifier Circuit Technical Book in fairly good condition with scuffs, discolouration, foxing , and a few bumps on the edges commensurate with age and use. It has also been annotated by a previous owner.\u003c\/p\u003e\n\u003cp\u003eApproximate Size (WHD):- 14 x 20.5 x 0.5cm\u003c\/p\u003e\n\u003cp\u003eA stapled large pocket-size soft back book comprising 86 pages on home construction of a 10-watt\/ 5 valve amplifier, (6 chapters), including a circuit diagram and valve data for various types of valves from an EF86 to GZ32.\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/mullardantiques.co.uk\/collections\/non-fiction-reference-books\" target=\"_blank\"\u003evintage reference books. \u003c\/a\u003e\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":56568918409591,"sku":null,"price":10.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Vintage_5_Valve_10_Watt_High_Quality_Amplifier_Circuit_Technical_Book.jpg?v=1768838890"},{"product_id":"collection-of-three-ww2-wehrmacht-eigentum-german-thermionic-valves","title":"Collection of Three WW2 Wehrmacht Eigentum German Thermionic Valves","description":"\u003ch1\u003eCollection of Three WW2 Wehrmacht Eigentum German Thermionic Valves \u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThis is a Collection of Three WW2 Wehrmacht Eigentum German Thermionic Valves. They haven't been tested and are sold as a collectible, for display only. However, the getter is still silver on each valve.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease click on the following link for more vintage militaria.\u003c\/span\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":56575176474999,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Collection_of_Three_WW2_Wehrmacht_Eigentum_German_Thermionic_Valves.jpg?v=1768924581"},{"product_id":"collection-of-eleven-ww2-wehrmacht-eigentum-german-thermionic-valves","title":"Collection of Eleven WW2 Wehrmacht Eigentum German Thermionic Valves","description":"\u003ch1\u003eCollection of Eleven WW2 Wehrmacht Eigentum German Thermionic Valves \u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThis is a Collection of Eleven WW2 Wehrmacht Eigentum German Thermionic Valves. They haven't been tested and are sold as a collectible, for display only. However, the getter is still silver on each valve.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/militaria-and-military-collectables\" target=\"_blank\" rel=\"noopener\"\u003evintage militaria\u003c\/a\u003e.\u003cmeta charset=\"UTF-8\"\u003e\u003c\/p\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":56575302304119,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Collection_of_Eleven_WW2_Wehrmacht_Eigentum_German_Thermionic_Valves_1.jpg?v=1768925467"},{"product_id":"collection-of-four-ww2-wehrmacht-eigentum-german-thermionic-valve-bases","title":"Collection of Four WW2 Wehrmacht Eigentum German Thermionic Valve Bases","description":"\u003ch1\u003eCollection of Four WW2 Wehrmacht Eigentum German Thermionic Valve Bases\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThis is a Collection of Four WW2 Wehrmacht Eigentum German Thermionic Valve Bases. They haven't been tested and are sold as a collectible, for display only. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/militaria-and-military-collectables\" rel=\"noopener\" target=\"_blank\"\u003evintage militaria.\u003c\/a\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003c\/p\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":56575428067703,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Collection_of_Four_WW2_Wehrmacht_Eigentum_German_Thermionic_Valve_Bases.jpg?v=1768926161"},{"product_id":"1920s-mullard-pm14-tetrode-radio-valve-in-its-original-box","title":"1920s Mullard PM14 Tetrode Radio Valve In Its Original Box","description":"\u003ch1\u003e1920s Mullard PM14 Tetrode Radio Valve In Its Original Box\u003c\/h1\u003e\n\u003cp\u003eThis amazing collectible is a 1920s Mullard PM14 Tetrode Radio Valve In Its Original Box; where PM stands for Philips-Mullard. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eA nice display item for the office or radio shack!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt is nearly 100 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003eit is being sold as a collectible for display only\u003c\/span\u003e. \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis high frequency amplification valve has its original paper label with the warning \"\u003cspan class=\"c8\"\u003eTHERE IS PRACTICALLY NO GLOW FROM THIS FILAMENT\u003c\/span\u003e\" and information about the filament voltage and current, and maximum anode voltage. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe nicely designed cardboard box is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal Specification:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mullard Radio Valve Co.Ltd etched on the side in white\u003c\/li\u003e\n\u003cli\u003eType: Tetrode\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBase: 4-Pin B4 with a single slot in each pin (split pin)\u003c\/li\u003e\n\u003cli\u003eFilament: \u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVoltage 4.0 Volts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCurrent ~0.075 amps \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eAnode Voltage 150 Volts\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eScreen Voltage:  75 Volts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-tubes\" target=\"_blank\"\u003evintage valves\u003c\/a\u003e and \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/amateur-radio-equipment\" target=\"_blank\"\u003eradio ephemera\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003ePS: My apologies for the visible fingers in the valves, I need them so they are not included...  ;-)\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":56763498037623,"sku":null,"price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1920s_Mullard_PM14_Tetrode_Radio_Valve_In_Its_Original_Box.jpg?v=1771508593"},{"product_id":"1957-mod-cv1504-half-wave-high-voltage-rectifier-valve","title":"1957 MOD CV1504 Half-wave High Voltage Rectifier Valve","description":"\u003ch1\u003e1957 MOD CV1504 Half-wave High Voltage Rectifier Valve\u003c\/h1\u003e\n\u003cp\u003eThis large valve is a vintage 1957 MOD CV1504 Half-wave High Voltage Rectifier Valve.  In very good cosmetic condition, with a few surface scuffs and blemishes, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003eit has not been tested and is sold as a collectible for display only.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePurportedly designed for use in X-Ray equipment, this particular valve was manufactured by \u003cem data-mce-fragment=\"1\"\u003eUnited Electronics Co., Newark, NJ, USA, \u003c\/em\u003ehowever, this valve type was also made by several different manufacturers including \u003cem\u003eEdiswan\u003c\/em\u003e, who produced the prototype (V1901).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Size\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeight: 45.0cm\u003c\/li\u003e\n\u003cli\u003eWidth: 14.5 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe valve is etched on the side as follows:-\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cem\u003eCrown\u003c\/em\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cem\u003eVU504\u003cbr\u003e16.5-40MA \u003cbr\u003e10E\/150 \u003c\/em\u003e(where 10E is the RAF stores reference for Magnets and Radio Valves (Industrial Types))\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eArmy arrow↑ NL\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCV1504\/J\u003c\/em\u003e (which means that it was made 11\/1957)\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eUnited Electronics Co. USA\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:-\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eThe filament consists of two hairpins of tungsten.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eThe filament is marked VU504 on one side and 9K-145 on the other.\u003c\/li\u003e\n\u003cli\u003eThe valve has the designation VU504 = 10E\/150= CV1504 \u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"UTF-8\"\u003e \u003cspan\u003e16.5V\/15.2A filament, 60kV\/40MA rating. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBase: Edison E27 screw fitting (27mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSince it is unlikely that collectors will use them as intended, some people have looked for alternate uses and have even converted them into novelty lamps!\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eA nice piece of Electrical history to add to your collection! \u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-technology-scientific-engineering-imaging-medical-equipment-instruments-tools\" target=\"_blank\"\u003evintage technology.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eNB: Although the valve isn't heavy, it will cost quite a lot to ship due to its size! In the UK this means shipping as a medium parcel.\u003c\/p\u003e","brand":"United Electronics Co.","offers":[{"title":"Default Title","offer_id":56868360978807,"sku":null,"price":34.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/1957_MOD_CV1504_Half-wave_High_Voltage_Rectifier_Valve.jpg?v=1761582621"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/collections\/DSC01554.jpg?v=1773939140","url":"https:\/\/mullardantiques.co.uk\/collections\/thermionic-valves-vacuum-tubes.oembed?page=2","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}