{"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":40.0,"currency_code":"USD","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","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/1920s-mullard-pm1-lf-radio-valve-in-its-original-box","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}