Quote:
Originally Posted by jim3860
Hmmm.... I do have a pair of Telkefunken well almost Telefunken 12AT7's they have Telefunken labels but no diamond in the bottom according to the etched numbers and symbols they appear to be made by Simens for Telefunken is my guess, but no 12AV7's Jay sorry.
REGARDS JIM
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If you have anything that uses 12AU7s, get you some and try them. I'm running a little single 12AU7 tube headphone amp in my work truck and have been rolling tubes for about a week. I happen to notice that one of my sub books said 12AV7 is plug and play for 12AU7 so I dug up an NOS Sylvy and plugged it in today. Holy shit, it's like a totally different amp. The bass is tighter than little sister, wonderful midrange, and highs out past where I can hear. I rolled a bunch of tubes through this because it really points the weaknesses out, but this tube has none. They are dirt cheap on ebay too, so I bought a shitload of them today. They're like 5 bux a tube for NOS.