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Telefunken 12AX7 / ECC83 - smooth plates, various labels
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Price: From $37.00 to $109.00
Product Options
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Description
This
1960s Telefunken ECC83 / 12AX7 has smooth gray plates and a diamond
imprint on the base. The white print on the glass is labeled for other companies (Fisher, Dynaco, Silvertone, etc) and says "Made in Western Germany" (label may be partial).
Don't miss this opportunity to hear one of the best sounding—and hardest to find—12AX7s ever made!
Testing
This tube 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. See product options for current availability.
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 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 a
sample from the lot. Matched sets, when available, are listed as Item 613.
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This 1958 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 1959 Telefunken 12AX7 / ECC83 tubes in this precisely matched pair have ribbed plates and diamond imprints on the bases. The white labels have the Telefunken logos. Both tubes test at about 80% of spec for Gm with phono grade noise levels.
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The 1964 Telefunken 12AX7 / ECC83 tubes in this precisely matched pair have smooth plates and the diamond imprint in the base. The white labels have the Dynaco logo (partial). Both tubes test as new with balanced sections and 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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