Raytheon JAN CRP 12AT7 Gray Plate Well Matched (4.8%) Pair NOS ECC81

This is a well matched pair of Raytheon JAN 12AT7 vacuum tubes. These tubes were made in the USA and were manufactured to rigorous military specifications so you can expect low noise and microphonics. Both tubes are very closely balanced. These tubes have short, ribbed gray plates, red or yellow lettering, and a slanted square top or halo getter. These are highly sought after Raytheon JAN 12AT7 tubes, act quickly before they sell out!! More available upon request.

Be wary of sellers who list tubes that are matched without providing test results or the equipment that they used to test the tubes.

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

3,900/3,950
4,100/4,000