Sylvania JAN 12AT7WC Black AX-Style Plates Well Matched (6.4%) Pair NOS 12AT7 ECC81 12AT7WA

This is a well matched pair of Sylvania JAN 12AT7WC tubes. They were made in the USA by Sylvania for the US military. Each one of these tubes tests very closely to the other. These tubes are visually almost identical. They were manufactured to rigorous military specifications so you can expect low noise and microphonics. These tubes have flat black AX-style plates, green lettering, and a halo top getter. These are highly sought after Sylvania 12AT7WC tubes, 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 this tube on my recently calibrated Hickok 600a and TV7D/U tube testers.

The results are as follows:

5,050/5,400
5,100/5,300