Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS NIB US-Made 105 I have played it in

I have played it in my Bottlehead Crack headphone amplifier and it sounds outstanding

GE-LABELED 6AQ8 / ECC85 tube was tested on our Paul Hart-calibrated TV7/U for shorts

This tube has a dual-plate structure

new in box US-made 17CT3 tubes tested to spec on our Paul Hart-calibrated TV7/U

These tubes have black plates with lots of crosshatching

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS NIB US-Made 105 I have played it inThis new old stock, new in box 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 82 76 while Tube Two measured 82 78 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