1960's Quad RCA 12AX7A Preamp Tubes 12AX7 Test New
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- Source eBay
Attention: Pleasenote that I will be out of town from June 15 th , 2011 through June 22 nd , 2011. You are welcome to purchase this item, but I will not be able to ship it until June 23 rd , 2011. Any items sold while I am away will ship promptly on June 23, 2011. I will be available via e-mail periodically while I am gone. Thank You and good luck bidding out there! Vintage 1960's quad of RCA 12AX7A ECC83 Preamp Tubes. Gray plates, top halo getter. Tested for shorts, gas and mutual conductance on my calibrated TV-7D/U tube testers. Quad tests above new @ 52/52, 52/54, 52/54 and 54/56 where the minimum good value on the TV-7 is 32/32. Premium USA manufactured audio tubes. Tone City. All tubes tested on TV-7D/U testers calibrated by Dan Nelson.
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