Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing In Nixon's America incredibly-super-rare

incredibly-super-rare

new in box RCA 12AJ6 tube tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing milspec

3 dB (-92 dB is the Maxi-Matcher's noise floor)

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing In Nixon's America incredibly-super-rareThis new old stock testing matched pair of RCA 6FQ7 6CG7 dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas and their readings are as follows: Tube One measured 76 73 while Tube Two measured 79 72 where minimum (65%) is 50 50 and 100% is 77 77. These tubes have steel support rods; ladder plates; side D getters and excellent flashing. As I write, I am playing them with adapters (not included) in my