{"product_id":"7643-e80cf-amperex-mullard-mitcham-plant-matched-pair-tubes-made-in-gt-britain","title":"7643 ( E80CF ) MULLARD Mitcham plant Gold Pin Matched Pair Tubes MADE in GT. BRITAIN","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e7643 ( E80CF ) MULLARD Mitcham plant Gold Pin Matched Pair Tubes MADE in GT. BRITAIN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e Same Manufacturing Code:\u003cbr\u003e BG2 R4J2\u003c\/p\u003e\n\u003cp\u003e MADE BY MULLARD UK, labelled AMPEREX\u003c\/p\u003e\n\u003cp\u003e Valves tested on AVO VCM 163 Tube tester:\u003cbr data-mce-fragment=\"1\"\u003e Voltage Test:\u003cbr\u003e Triode Va = 100V, Vg = -2V\u003cbr\u003e Pentode\u003cmeta charset=\"utf-8\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eVa = 200V,\u003cmeta charset=\"utf-8\"\u003e Vg2 = 175V, Vg = -2V\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e Average 100% Triode Gm = 5000; Ia = 14 mA\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eAverage 100% Pentode\u003cmeta charset=\"utf-8\"\u003e Gm = 6200 ; Ia = 10 mA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eTest Result: VERY STRONG\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e Valve 1\u003cbr data-mce-fragment=\"1\"\u003e Section 1: Gm 5100 ; Ia 13.5 mA\u003cbr data-mce-fragment=\"1\"\u003e Section 2: Gm 6000 ; Ia 12.0 mA\u003cbr data-mce-fragment=\"1\"\u003e Valve 2:\u003cbr data-mce-fragment=\"1\"\u003e Section 1: Gm 5100 ; Ia 14.0 mA\u003cbr data-mce-fragment=\"1\"\u003e Section 2: Gm 6000 ; Ia 13.0 mA\u003c\/p\u003e\n\u003cp\u003e Further tests performed:\u003cbr data-mce-fragment=\"1\"\u003e Microphonics Test\u003cbr data-mce-fragment=\"1\"\u003e Emission Quality\u003cbr data-mce-fragment=\"1\"\u003e Short Circuit Test\u003cbr\u003e\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":43150717583607,"sku":"00822T","price":59.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/products\/7643-e80cf-amperex-mullard-mitcham-plant-gold-pin-matched-pair-tubes-made-in-gt-britain-224716.jpg?v=1660945616","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/7643-e80cf-amperex-mullard-mitcham-plant-matched-pair-tubes-made-in-gt-britain-en","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}