4 Ken-Rad 50L6 50L6GT Vacuum Tubes Valves Black / Gray Glass Lot Of Four Matched Pair 6AX4

4 Ken-Rad 50L6 50L6GT Vacuum Tubes Valves Black / Gray Glass Lot Of Four Matched Pair 6AX4This lot of four Ken Rad coated glass 50L6GT tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 38, 58, 60 and 68 where minimum (65%) is 45. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST

top mica spacers with smooth-sided rectangular bottom mica spacers

new in box RCA 6HS5 tested to spec on our Paul Hart-calibrated TV7/U

but followed the original score and was recorded in the latter 1950s

42 and 56 where minimum (65%) is 40

Transconductance measured 3900/4500 micromhos

This pressing has light surface noise audible in quiet passages and barely audible in voice-level passages

36/37 and 40/38where minimum (65%) is 40/40

I have played it in my Schiit Audio Vali 2 headphone amplifier and it sounded great

new in box Italian Sylvania 12SN7GTA dual triode was tested on our Hickok 600A for shorts

It was made in Germany

new in box US-made 9AU7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This new in box JJ 6BQ5 was tested on our Maxi-Matcher with 325 volts on the plates and a bias of -14 volts for shorts