Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing July 30 2023 new in box Hytron 6AD7G

new in box Hytron 6AD7G tube tested to spec on our Paul Hart-calibrated TV7/U

OEM-BRANDED black glass 6K6GT tubes were tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts and tested as follows:

5 record cleaner and then played it on my He-Man Rig which consists of a Rega Planar Three with an Ortofon X5-MC cartridge on an RB-300 tone arm with a Cern Audio Dual 6SN7 / 6SL7 phono preamp / preamp feeding my Bottlehead Crack headphone amplifer driving Sennheaiser HD 580 cans

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4 (New/nominal according to M-M is 50/50 for this tube's cousin

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing July 30 2023 new in box Hytron 6AD7GThis 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 75 86 while Tube Two measured 79 79 where minimum (65%) is 50 50 and 100% is 77 77. These tubes have steel support rods; ladder plates and side D getters. I played them with adapters (not included) in my Radio Craftsmen RC 2 monoblocks and