Matched Quad Philips What Miniwatt PCF80 9U8 Vacuum Tubes US-Made Octal One is simply labeled "XXFM

One is simply labeled "XXFM

These two Hytron 7C4 tubes tested to spec on our Paul Hart-calibrated TV7/U

It measured 54 for minimum (65%) is 38 and 100% is 58

4 milliamps for Tube One and 2740/38

These lot of three mesh plate

Matched Quad Philips What Miniwatt PCF80 9U8 Vacuum Tubes US-Made Octal One is simply labeled "XXFMThis 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