WHAT! Tung Sol 6550 made in USA 1967 Quad, all test strong
I need to be very clear on this, I only rank these as 1/10 because I've never used them myself, not because i know or think they are broken, if you are interested and know of someone close to Charleston SC, Im happy to put them in your buddys' amp or tester. . .So, with that caveat, here is a Quad of Tung Sol 6550 made in USA ( not reissue Russian ) tubes. These tubes were last tested in...
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