RCA 12AU7 Long Black Plate Balanced Single NOS 12AU7A

This is a well balanced single RCA long black plate 12AU7 tube that was made in the USA. This tube was manufactured to rigorous specifications and you can expect low noise and great performance. This tube has plates that test very closely to each other. This tube has long black plates, white or faded lettering, and an angled square top getter. These are highly sought after RCA 12AU7 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 hand tested these tubes on my recently calibrated Hickok 600a and TV7D/U tube testers.

The test results are as follows:

3,000/2,650