RCA 12AT7 Black Plate Square Getter Matched Pair NOS 12AT7 ECC81

This is a well matched pair of RCA 12AT7 tubes. Each one of these tubes tests closely to the other. These tubes are visually almost identical.  They were manufactured to rigorous industrial specifications, so you can expect low noise and microphonics. These tubes have flat black plates shaped like wings, red lettering, and a square top getter. These are highly sought after RCA 12AT7 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 these tubes on my recently calibrated Hickok 600a and TV7D/U tube testers.

The results are as follows:

4,000/4,450
4,000/4,350