Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS NIB US-Made 105 This Lansdale (Philco's in-house tube

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

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

three horizontal holes underneath and parallel to the plates' short axes and excellent flashing

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

Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes NOS NIB US-Made 105 This Lansdale (Philco's in-house tubeThis 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