Matched Quad Philips What Miniwatt PCF80 9U8 Vacuum Tubes Valves

Matched Quad Philips What Miniwatt PCF80 9U8 Vacuum Tubes ValvesThis matched pair of Philips Miniwatt PCF80 9U8 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 95 81, 95 84, 96 84 and 96 85, respectively. Minimum (65%) is 57 57. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHELEC" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR

it has no gross issues such as hum or microphonics and will work excellently in your audio device that calls for a 12AT7

This new old stock-testing Svetlana 6550B / 6P27 perforated plate output tube was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -48 volts for shorts

This lot of six new old stock

The diodes measured 54 and 56

and dynamics even though these amplifier use 6J5s

new in box matched quad of CBS-Hytron black plate 6CL6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box US-made 6KU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of Sylvania black plate 12BY7 / 12BY7A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

6 milliamps' plate current and measured 1610 micromhos

5 dB (-92 dB is the Maxi-Matcher's noise floor)

new in box RCA 6SD7GT pentode tested to spec on our Paul Hart-calibrated TV7/U

This beautiful new old stock