Matched Pair National Union JAN-CNU-6V6-GT VT107A 6V6 6V6GT Vacuum Tubes Milspec Gray Glass

Matched Pair National Union JAN-CNU-6V6-GT VT107A 6V6 6V6GT Vacuum Tubes Milspec Gray GlassThis matched pair of milspec National Union VT 107 A JAN CNU 6V6 GT gray glass output tubes was tested on our Maxi Matcher 2 with 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 2230 micromhos for Tube One (Missing centering pin, marked for safe and easy insertion; see close up, Picture Three) and 2500 for Tube Two (Cracked base, tube itself neverless solidly

It is dead quiet when the preamp is muted and have excellent frequency response and dynamics

wire snubbers (for low microphonics) and excellent flashing

new in box Ken-Rad 5W4 rectifier tube tested to spec on our Paul Hart-calibrated TV7/U

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

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

This matched trio of RCA 6BY5GA tubes were tested on our Paul Hart-calibrated TV7/U for shorts

67 and 74 where minimum (65%) is 53

5-8 out of 10

am showing both sides of the watch to make identification as easy as possible

64 and 64 where minimum (65%) is 50 and 100% is 77

Audio Power Output 50C5

marked for safe-and-easy insertion) was 28