Sylvania / Philco Made For Raytheon Lansdale 12AU7 Long Gray Plate Balanced Single NOS 12AU7A ECC82

This is a well balanced Sylvania 12AU7 tube that was made in the USA by Sylvania for Raytheon, in the Lansdale factory that made the legendary Philco 12AU7s. Philco sold the factory to Sylvania in the mid 50s, and continued to manufacture certain tubes, including this tube. The tube was manufactured to rigorous industrial standards, so you can expect low noise and microphonics. Each of the plates tests closely to the other. This tube has long black plates, yellow lettering, and a square top getter. These are highly sought after Sylvania/Philco 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:

2,250/2,600