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Brimar 12AX7 / CV4004 - matched pair, phono grade

Brimar 12AX7 / CV4004 - matched pair
Price: $197.00
1 matched pair in stock
Item Number: 1083
Manufacturer: Brimar
Description

The 1960s Brimar CV4004 tubes in this precisely matched pair are military spec 12AX7 tubes made in Great Britain. They have long narrow plates and halo getters. The white print on the glass has the Brimar logo and BVA military insignia, and says "Made in England."  
 
Testing

These tubes test as new.
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

These tubes test as “phono grade”—the quietest range for noise and microphonics—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. Tubes ship in new white boxes with test results for current draw (mA) and transconductance (Gm). Photo is of the actual tubes. Singles, when available, are listed as Item 1021.
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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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