TELEFUNKEN
Matched Pair 12AX7 Telefunken ECC83 Tested 85/100% Smooth Anodes DB Berlin Codes
Matched Pair 12AX7 Telefunken ECC83 Tested 85/100% Smooth Anodes DB Berlin Codes
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One Matched Pair (2 tubes) 12AX7 Telefunken ECC83
Smooth plates, RARE one big side holes, diamond bottom, the same Berlin tube plant codes.
Pull outs. One pair is 85%, the another one is 100% of NOS values. Very nice, perfectly balanced tubes with a lot of life left in them.
Tested also for hum and microphonics in RIAA preamp.
They are tested with 250V on anodes and -1.5V on grids, 100% is 2.15 mA, they test (1.8/1.7) (2.2/2.2) mA
