RCA 6X4 NOS Rectifier 6X4 EZ90

This is a single RCA 6X4 vacuum tube. This tube has a 7 pin tall glass bottle with RCA markings on the tube.  It tests very strong, with greater than NOS readings. This tube has black plates, clear glass, red lettering, and top getter. This is an excellent RCA 6X4 tube that is highly sought after, act quickly before these sell out! More available upon request.

This is a listing with multiple quantity available. Some of the tubes have original boxes, some have white boxes, but all have past the same rigorous testing regimen. Some of the tubes have red lettering and some have white lettering, some of which may be faded. Please let me know if you require original boxes or other accommodations and I will accommodate if they are still available, at no extra cost to you.

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 these tubes 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.