Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing September 15 2024 This lot of four Sylvania

This lot of four Sylvania 12Q7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing matched pair of milspec Raytheon black glass VT-107-A / JAN-CRP-6V6-GT output tubes was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -36 volts for shorts

These three UK-made 10DX8 LCL84 tubes tested to spec on our Paul Hart-calibrated TV7/U

There were no shorts or gas and it measured 40/37 where minimum (65%) is 32/32 and 100% is 49/49

new in box US-made 117L7GT / 117M7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing September 15 2024 This lot of four SylvaniaThis new old stock testing 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 74 76 while Tube Two measured 76 76. Tube Three measured 76 76 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