GE JAN 6189 Triple Mica Well Matched Pair (3.3%) NOS 12AU7 ECC82

This is a well matched pair of GE JAN 6189 tubes. They were manufactured in the USA by GE for the US military. They test very close to each other, and stronger than NOS. These tubes have been manufactured to meet the highest military standards, so you can expect low noise and microphonics. Both of these tubes have short (14mm) gray plates, matching date codes, triple micas, white lettering, and top halo getters. These are excellent GE 6189W/12AU7 tubes that are highly sought after, act quickly before they sell out!! More available upon request.

Be careful buying tubes from other sellers who list "matched pairs" but do not provide test results or specify the equipment that they use to test their tubes.

I personally tested these tubes on my recently calibrated Hickok 600a and my TV7D/U tube testers and the results are as follows:

3,025/2,950
2,925/2,925