{"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":46.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC06209_1.jpg?v=1680017371","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/1920s-boxed-tungar-rectifier-valve-made-by-british-thomson-houston-bth","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}