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Amperex 6922 / E88CC - PQ label, early D getter, phono grade

Amperex 6922 / E88CC - D getter, phono grade
Price: $134.00
1 in stock
Item Number: 508
Manufacturer: Amperex
Description

This rare 1959 Amperex PQ 6922 / E88CC tube is a premium quality 6DJ8 / ECC88 type tube (7L4 series). It is one of the earliest Amperex 6922 types, with a slightly taller bottle than later 6922 tubes.
 
It has the following characteristics:
  • tall bottle with creases on top 
  • the New York factory code etched in the glass
  • gray risers
  • round shield with two raised rectangular sections on opposite sides
  • D getter with wide support post
  • white PQ label
  • gold pins
Testing

This tube tests at about 80% of spec for Gm on both sections. 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

This tube tests as “phono grade”—the quietest range for noise and microphonics—on our custom noise testing equipment. It is an excellent choice for
phono stages, microphone preamps, DA converters, and other sensitive applications.
 
Pricing

This tube is sold individually. It ships in its original box with test results for current draw (mA) and transconductance (Gm) for each triode section. Photo is of the actual tube. 

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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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