Matched Pair Sylvania 6V6 6V6GT Gray And Silver Bottle Silver Top Vacuum Tubes NOS-Testing Kitty new in box Zenith 6AF5G

new in box Zenith 6AF5G tube tested to spec on our Paul Hart-calibrated TV7/U

Seven are 6S4As and one is a 6S4

It has a micanol base

new in box GE 12DK7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 6V6 6V6GT Gray And Silver Bottle Silver Top Vacuum Tubes NOS-Testing Kitty new in box Zenith 6AF5GThis new old stock testing matched pair of silver top Sylvania 6V6GT output tubes was tested on our Maxi Matcher 2 for shorts, gas and transconductance. There were no shorts or gas. Plate current measured 24. 5 milliamps and transconductance was 2480 micromhos for Tube One. Tube Two measured 25. 4 2660. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) They have tall