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

These tubes have black plates with lots of crosshatching

This Lansdale (Philco's in-house tube manufacturing arm) 12AU7 / ECC82 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

a clear top with red paint (indicating it is a selected

This album sounds bright

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