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Telefunken 12AX7 / ECC83 - smooth plates, phono grade
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SOLD OUT
Item Number: 240
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Description
This
1966 Telefunken ECC83 / 12AX7 has smooth gray plates and a diamond
imprint on the base. The white print on the glass has the Telefunken
logo and says “Made in Germany.”
Don't miss this opportunity to hear one of the best sounding—and hardest to find—12AX7s ever made!
Testing
This tube tests as new. It has been screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics on each triode section.
It was 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 that test as “phono grade” are the quietest range for noise and
microphonics on our custom noise testing equipment. It is an excellent
choice for sensitive applications such as V1 positions, microphone preamps, DA
converters, and phono stages.
Pricing
This
tube is sold individually. It ships in a new white box with test
results for current draw (mA) and transconductance (Gm). Photo is of the actual tube. Matched sets, when available, are listed as Item 617.
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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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The 1962 Telefunken 12AX7 / ECC83 tubes in this precisely matched pair have smooth plates. The white labels have Telefunken logos. Both tubes test 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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