Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing In Nixon's America new in box RCA 12AJ6

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

they can put out as much as 2A3s and fell into disfavor because of socket supply issues

The spine is in fine shape with no loose pages and APPEARS to be leather-bound

This new old stock-testing milspec

6 volts on the filaments

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing In Nixon's America new in box RCA 12AJ6This 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