Matched Quad Philips Miniwatt PCF80 9U8 Vacuum Tubes

Matched Quad Philips Miniwatt PCF80 9U8 Vacuum TubesThis 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 86 82, 89 76, 89 77 and 90 75, 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 OR

new in box RCA 5AM8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This lot of twelve new old stock

gray bottle type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:

Bottom: crenelated

There was no gas

This trio of RCA gray glass 12BY7 / 12BY7A tubes was tested on our Paul Hart-calibrated TV7 for shorts

dimpled sheet getters and excellent flashing

Transconductance measured 28 for Tube One and 30 for Tube Two where minimum (65%) is 25 and 100% is 38

This lot of three Ken-Rad 6AC7s was tested on our Paul Hart-calibrated TV7/U for shorts

This perfectly-matched pair of milspec GE 6C4 6C4WA triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Please refer to the pictures to confirm this album and its contents as my Bulgarian is worse than bad

gray plates