Matched Quad Philips Miniwatt PCF80 9U8 Vacuum Tubes Brimar NOS NIB rectangular mica spacers and gapped-D

rectangular mica spacers and gapped-D getters

I am playing it in my Pro-Ject Tube Box S phono pre-preamplifier (tube on right) with John Mayall’s seminal "The Blues Alone" album

Transconductance was 1620 for Tube One and 1730 for Tube Two where new/nominal is within one standard deviation of 1900

These five GE 6BL8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Quad Philips Miniwatt PCF80 9U8 Vacuum Tubes Brimar NOS NIB rectangular mica spacers and gapped-DThis 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 80 66, 80 70, 80 70 and 82 70, respectively where 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