Matched Pair Philips Miniwatt PCF80 9U8 Vacuum Tubes Valves JAN-CNU-807 Milspec Transconductance measured 65/34

Transconductance measured 65/34

Plate current measured 67

Transconductance was 1670 for Tube One and 1570 for Tube Two where new/nominal is within one standard deviation of 1900

These five US-made GE 12AQ5s were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair Philips Miniwatt PCF80 9U8 Vacuum Tubes Valves JAN-CNU-807 Milspec Transconductance measured 65/34This matched pair of Philips Miniwatt PCF80 9U8 tubes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. They measured 84 74 for Tube One and 87 73 for Tube Two where minimum (65%) is 57 57 and 100% is 88 88. 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