{"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","url":"https:\/\/mullardantiques.co.uk\/products\/1920s-mullard-pm14-tetrode-radio-valve-in-its-original-box","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}