Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS NIB US-Made 105 new in box 14BR11 tubes

new in box 14BR11 tubes tested to spec on our Paul Hart-calibrated TV7/U

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

I am playing it in my Pro-Ject Tube Box S phono pre-preamplifier with John Mayall’s seminal "The Blues Alone" album

black and silver bottles and 6-52 188-5 and 3-09 188-5 provenance/date codes

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

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS NIB US-Made 105 new in box 14BR11 tubesThis 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