TELEFUNKEN
Platinum Matched Pair 12AX7 Telefunken ECC83 Tested 85%Ribbed Anodes DB
Platinum Matched Pair 12AX7 Telefunken ECC83 Tested 85%Ribbed Anodes DB
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Platinum Matched Pair (2 tubes) 12AX7 Telefunken ECC83
Ribbed plates, RARE no side holes, diamond bottom, the same Berlin tube plant codes.
Pull outs Tested 85-90% 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 (2.0/1.8) (1.8/1.7) mA
