Matched Pair RCA 6FQ7 / 6CG7 Vacuum Tubes

Matched Pair RCA 6FQ7 / 6CG7 Vacuum TubesThis 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 60 56 while Tube Two measured 61 58 where minimum (65%) is 50 50 and 100% is 77 77. These tubes have steel support rods; ladder plates; side D getters and excellent flashing. As I write, I am playing them with adapters (not included) in my Radio Craftsmen RC 2

It was made in the US

new in box EI-MANUFACTURED

Tube One: 20

matte-black plates

They were Apex-matched

(New 6SN7s typically test from 2600 micromhos and the Jackson expresses this in terms of a percentage

wire or mica snubbers (for low microphonics) and excellent flashing

There is no album cover

Its first section measured 40 and its diode sections both measured 78 where minimum (65%) is 32 for section one and 40 for the dide sections

new in box Philco 6AG7 tubes tested to spec on our Paul Hart-calibrated TV7/U

They sound spacious with excellent dynamic range and frequency response on these challenging pieces -- and are dead quiet when the CD player is muted

new in box US-made 17D4 tubes tested to spec on our Paul Hart-calibrated TV7/U