Telefunken Philips radiotron Quad ECC81 12AT7 AVO 163 tested tubes $20.00 USD Sold on: 2013-Mar-09 Marketplace: eBay 1 Treasure 0 Trash 100% Detail: Here are 4 ECC81 12AT7 for you tube rollers. You will get a Genuine Telefunken and Amperex from Holland and 2 from the UK BVA. . . These tubes were tested on an AVO 163. The test for a NEW ECC81... More Relevance Historical Items
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