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Telefunken 12AX7 / ECC83 - smooth plates, matched pair
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1 matched pair in stock
Item Number: 617T
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Description
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 and the tube bases have the Telefunken diamond imprints stamped in them.
Testing
Both 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
Both 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.
Pricing
These tubes are sold as a matched pair. They ship in new white boxes with test results for current draw (mA) and transconductance (Gm). Singles, when available, are listed as Item 31. |
This 1963 Telefunken ECC83 / 12AX7 has long ribbed plates and a halo getter. The white label on the glass has the Telefunken logo in excellent condition. The diamond imprint on the base. Tube tests as new with phono/V1 grade noise levels.
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This 1966 Telefunken ECC83 / 12AX7 has smooth gray plates. The white print on the glass has the Telefunken logo and the diamond imprint on the base. Tube tests as new with phono grade noise levels.
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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.
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