Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing 6265 NOS NIB black plates and nice hot-stamped

black plates and nice hot-stamped bases

This new old stock-testing lot of six Tung-Sol black glass 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of --36 volts for shorts

new in box US-made 8BA11 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube Five: 29

new in box GE 38HK7 tube tested to spec on our Paul Hart-calibrated Hickok TV7/U

Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing 6265 NOS NIB black plates and nice hot-stampedThis 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