Telefunken 12AX7 / ECC83 - smooth plates, matched pair
Item Number: 617T
The 1962 Telefunken 12AX7 / ECC83 tubes in this precisely matched pair have smooth plates and halo getters. The white print on the glass has the Telefunken logo with matching date codes ("gi" = Dec 1962), and says "Made in West Germany." The tube bases have the Telefunken diamond imprints stamped in them.
These tubes test as new with balanced sections. They are precisely matched for both current draw (mA) and transconductance (Gm). They have been screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics on each triode section. They were tested at typical operating voltages on a laboratory grade
Amplitrex AT1000 (manual setting, fixed bias mode). Learn more about our
testing process here.
Noise and microphonics
tubes test as "phono grade"--the quietest range for noise and
microphonics levels--on our custom noise testing equipment. They are an excellent
choice for sensitive applications such as microphone preamps, DA
converters, and phono stages.
These tubes are sold as a matched pair. They ship in new white boxes with test results for current draw (mA) and transconductance (Gm). Photo is a sample from the lot. Singles, when available, are listed as Item 31.
TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.
May 21-31 will
ship June 2-3.