{"product_id":"6l6gb-rca-gray-plates-bottom-dd-getter-matched-tubes-made-in-usa","title":"6L6GB RCA Gray Plates Bottom DD Getter Matched Tubes MADE IN USA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e6L6GB RCA Gray Plates Bottom DD Getter Matched Quad Tubes MADE IN USA\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cspan\u003eAll tubes are made by RCA USA, identical in appearance and internal structure. They feature the distinctive hexagonal RCA logo. One tube is branded for the Baldwin Piano Company.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eThe color on the center key of the socket indicates that they were selected directly by RCA for low background noise.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e \u003cspan\u003eTested with AVO VCM 163 Tube tester:\u003cbr\u003e Vf = 6.3V; Va = 350V; Vg2 = 250V; Vg = -18V\u003cbr\u003e Average 100% Gm = 5200 ; Ia = 54 mA\u003cbr\u003e \u003cstrong\u003eTEST RESULT: VERY STRONG\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eValve 1: Gm = 5100 ; Ia = 61 mA\u003cbr\u003e Valve 2: Gm = 5100 ; Ia = 58 mA\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eValve 2: Gm = 5000 ; Ia = 54 mA\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eValve 2: Gm = 5100 ; Ia = 55 mA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eFurther tests performed:\u003cbr\u003e Microphone Test\u003cbr\u003e Emission Quality\u003cbr\u003e Short Circuit Test\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eGAS Test\u003c\/span\u003e\u003c\/p\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":47285600977244,"sku":"00152","price":299.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/s-l1600-1_452d4aa0-aae4-4c87-b0cd-7c41e2da97f5.jpg?v=1699459631","url":"https:\/\/vacuumtubestreasures.com\/en-de\/products\/6l6gb-rca-gray-plates-bottom-dd-getter-matched-tubes-made-in-usa-en","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}