Sylvania 5Y3GT Black Plate Rectifier Balanced Single NOS 5Y3

This is a well balanced Sylvania 5Y3GT vacuum tube. This is from the legendary Sylvania early 1950s tube factories and it sounds great! It was manufactured to rigorous specifications for superior quality and long life. This tube has a medium glass bottle with Sylvania label on the base.  It tests very strong, with greater than NOS readings. It has black plates, green lettering, clear glass, and bottom getters. These are excellent Sylvania 5Y3 tubes that are highly sought after, act quickly before these sell out! More available upon request.

Be careful buying tubes from sellers who list tubes as matched if they do not provide test results or the equipment that they tested their tubes on.

I personally tested this tube on my recently calibrated Hickok 600a and my TV7D/U and the results are as follows:

Pass/Pass

*Rectifiers test on a pass fail scale, they are not measured on gm or transconductance.