{"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":40.0,"currency_code":"USD","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","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/1920s-mullard-pm3-radio-triode-valve-in-its-original-box","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}