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RCA 12AX7A - short gray plates, phono grade
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SOLD OUT
Item Number: 227
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Description
This 1960s RCA 12AX7A tube has short gray plates and a halo getter.
The red print on the glass has the RCA logo (may be partial/missing).
Testing
This tube tests as new and 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. They are an excellent
choice for sensitive applications such as V1, 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 pairs, when available, are listed as Item 631. |
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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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