Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing July 30 2023 5 record cleaner and then

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

This Raytheon 5Y4GT rectifier tube tested 62/54 where minimum (65%) is 40/40 and 100% is 62/62

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

new in box US-made number / type 89 tubes tested to spec on our Paul Hart-calibrated TV7/U

They measured 55/56

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing July 30 2023 5 record cleaner and thenThis 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