{"product_id":"telefunken-ef89-nos-vacuum-tube","title":"Telefunken EF89 (6DA6) NOS Vacuum Tube","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eProduced by Telefunken in West Germany during the 1950s, the EF89 is a miniature variable-mu pentode designed for radio-frequency and intermediate-frequency amplification in radio receivers. Its remote-cutoff characteristic allows receiver circuits to regulate gain as signal strength changes, supporting automatic gain control. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Telefunken EF89 \/ 6DA6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type\u003c\/strong\u003e: Round Grey Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Germany\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in New Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":67983154053356,"sku":"APS-1783-1","price":260.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":67983154086124,"sku":"APS-1783-2","price":236.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":67983154118892,"sku":"APS-1783-3","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":67983154151660,"sku":"APS-1783-4","price":520.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":67983154184428,"sku":"APS-1783-5","price":472.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":67983154217196,"sku":"APS-1783-6","price":440.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":67983154249964,"sku":"APS-1783-7","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":67983154282732,"sku":"APS-1783-8","price":108.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":67983154315500,"sku":"APS-1783-9","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/ID2A9764.jpg?v=1793203125","url":"https:\/\/apos.audio\/products\/telefunken-ef89-nos-vacuum-tube","provider":"Apos","version":"1.0","type":"link"}