Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes Number Sextel clear recording with sparking highs

clear recording with sparking highs and nice bass

This lot of two Philco new old stock-testing Majestic gray and silver bottle type / number 38 tubes tested 44 and 49 on our Paul Hart-calibrated TV7/U where minimum (65%) is 26 and 100% is 40

probably from the second half of the 1920s

new in box Philco 25Z6GT tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes Number Sextel clear recording with sparking highsThis matched trio 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 66 71 while Tube Two measured 68 67. Tube Three measured 70 70 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