Matched Quad Philips What Miniwatt PCF80 9U8 Vacuum Tubes US-Made Octal I am playing them as

I am playing them as I write in my Alan Eaton single-ended triode amplifier with Talking Heads' "Fear Of Music" and they sound outstanding

where minimum (65%) is 48

One is simply labeled "XXFM

52/52 and 54/54 where minimum (65%) is 40/40

Matched Quad Philips What Miniwatt PCF80 9U8 Vacuum Tubes US-Made Octal I am playing them asThis 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 101 82, 101 83, 102 83 and 102 86, 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 "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED