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Vacuum Tubes, Pair, RCA, JRC 6189 (Premium 12AU7), 3 Mica, Square Halo, Black Pl $29.99 USD Sold on: 2013-Feb-18 Marketplace: eBay ![]() 1 Treasure 0 Trash ![]() 100%This auction is for a vintage pair of RCA JRC 6189 (a premium, mil spec 12AU7 type). Black plates, 3 mica, double support rods, square getter halos, etc. These are nice tubes. All four sections test a... ![]() More Relevance Historical Items
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