{"product_id":"mullard-6ca4-ez81-gold-pin","title":"Mullard 6CA4\/EZ81 Gold Pin","description":"\u003ch2 data-section-id=\"5ibkyb\" data-start=\"0\" data-end=\"46\"\u003eMullard 6CA4 \/ EZ81 Gold Pin Rectifier Tube\u003c\/h2\u003e\n\u003cp\u003eBlackburn code: \"B9K2\"\u003c\/p\u003e\n\u003cp data-start=\"48\" data-end=\"380\"\u003eThe \u003cstrong data-start=\"52\" data-end=\"68\"\u003eMullard 6CA4\u003c\/strong\u003e, also known as the \u003cstrong data-start=\"88\" data-end=\"96\"\u003eEZ81\u003c\/strong\u003e, is a vintage 9-pin full-wave rectifier tube used in classic hi-fi amplifiers, radios, preamps, tuners, and smaller tube power supplies. This \u003cstrong data-start=\"239\" data-end=\"251\"\u003egold pin\u003c\/strong\u003e version is a premium-grade option for anyone restoring or upgrading vintage tube gear that specifically calls for a 6CA4 \/ EZ81.\u003c\/p\u003e\n\u003cp data-start=\"382\" data-end=\"778\"\u003eMullard rectifiers are already highly respected for their build quality, reliability, and long service life, but the \u003cstrong data-start=\"499\" data-end=\"535\"\u003egold pin EZ81 is especially rare\u003c\/strong\u003e. Finding one in \u003cstrong data-start=\"552\" data-end=\"604\"\u003etrue NOS condition with its original Mullard box\u003c\/strong\u003e is not something you see every day. For collectors, restorers, and serious hi-fi owners, that makes this tube both a functional upgrade and a highly desirable vintage piece.\u003c\/p\u003e\n\u003cp data-start=\"1006\" data-end=\"1217\"\u003eThe 6CA4 \/ EZ81 is commonly found in compact tube gear where a larger rectifier like a 5U4 or GZ34 is not required. It uses a \u003cstrong data-start=\"1132\" data-end=\"1156\"\u003e9-pin miniature base\u003c\/strong\u003e and is \u003cstrong data-start=\"1164\" data-end=\"1187\"\u003enot interchangeable\u003c\/strong\u003e with larger octal rectifiers.\u003c\/p\u003e\n\u003ch3 data-section-id=\"g3460r\" data-start=\"1219\" data-end=\"1234\"\u003eCommon Uses\u003c\/h3\u003e\n\u003cul data-start=\"1236\" data-end=\"1411\"\u003e\n\u003cli data-section-id=\"12zltof\" data-start=\"1236\" data-end=\"1264\"\u003eVintage hi-fi amplifiers\u003c\/li\u003e\n\u003cli data-section-id=\"2g7pyu\" data-start=\"1265\" data-end=\"1289\"\u003eIntegrated tube amps\u003c\/li\u003e\n\u003cli data-section-id=\"1glflos\" data-start=\"1290\" data-end=\"1305\"\u003eTube radios\u003c\/li\u003e\n\u003cli data-section-id=\"1eo95ba\" data-start=\"1306\" data-end=\"1336\"\u003eVintage tuners and preamps\u003c\/li\u003e\n\u003cli data-section-id=\"m46xj7\" data-start=\"1337\" data-end=\"1368\"\u003eCompact tube power supplies\u003c\/li\u003e\n\u003cli data-section-id=\"1lhu3cp\" data-start=\"1369\" data-end=\"1411\"\u003eReplacement for 6CA4 \/ EZ81 tube types\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1413\" data-end=\"1500\"\u003eEach tube is tested for proper rectifier function and carefully packed before shipping.\u003c\/p\u003e\n\u003cp data-start=\"1502\" data-end=\"1686\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1502\" data-end=\"1686\" data-is-last-node=\"\"\u003eA rare Mullard gold pin EZ81, offered in true NOS condition with its original box — built for serious restorations, collections, and vintage tube gear that deserves the real thing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Fuzz Audio","offers":[{"title":"Default Title","offer_id":42395968372771,"sku":null,"price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0275\/0699\/9331\/files\/Mullard_6CA4_EZ81_Gold_Pin_Rectifier_Tube.jpg?v=1778710371","url":"https:\/\/fuzzaudio.shop\/products\/mullard-6ca4-ez81-gold-pin","provider":"Fuzz Audio","version":"1.0","type":"link"}