{"product_id":"siemens-e180f-6688-nos-vacuum-tube","title":"Siemens E180F (6688) NOS Vacuum Tube","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eThe Siemens E180F, also known as the 6688, is a special-quality miniature pentode developed for wideband amplification. It belongs to a generation of tubes engineered for extended service life, mechanical durability, and precise electrical characteristics. Its nine-pin B9A base, 6.3V\/300mA heater, and nominal transconductance of 16.5mA\/V support its role as a compact, high-transconductance amplifier tube.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\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\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\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\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Siemens E180F \/ 6688\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 Gray Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMica Type: \u003c\/strong\u003eTriple Mica\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Type:\u003c\/strong\u003e Gold Pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eGermany\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":67791586623724,"sku":"APS-1462-1","price":140.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":67791586656492,"sku":"APS-1462-2","price":128.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":67791586689260,"sku":"APS-1462-3","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":67791586722028,"sku":"APS-1462-4","price":280.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":67791586754796,"sku":"APS-1462-5","price":256.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":67791586787564,"sku":"APS-1462-6","price":240.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":67791586820332,"sku":"APS-1462-7","price":60.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":67791586853100,"sku":"APS-1462-8","price":54.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":67791586885868,"sku":"APS-1462-9","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/ID2A9444_e86d662c-930a-450f-b064-76522b129042.jpg?v=1792424189","url":"https:\/\/apos.audio\/products\/siemens-e180f-6688-nos-vacuum-tube","provider":"Apos","version":"1.0","type":"link"}