Sylvania 5Y3GT Tall Boy Black Plate Rectifier Matched Pair NOS

This is a well matched pair of Sylvania 5Y3GT vacuum tubes. They were manufactured to rigorous specifications for superior quality and long life. These tubes have a tall glass bottle with Sylvania label on the slim base.  They test very strong, with greater than NOS readings. They have black box plates, red lettering, clear glass, and top 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

Pass/Pass

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