Matched Pair RCA / Cunningham 6F5 Vacuum Tubes Compact Disk CD totally unsuited for use in

totally unsuited for use in guitar amps or any other vibratory environment

These six 12BY7 / 12BY7A / 12BV7 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 46:

US-manufactured Amperex 7699 tube tested to spec on our Paul Hart-calibrated TV7/U

This CD plays fine

Matched Pair RCA / Cunningham 6F5 Vacuum Tubes Compact Disk CD totally unsuited for use inThis matched pair of Cunningham RCA 6F5s were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and both measured 33 where minimum (65%) is 25. These tubes were made in the same factory and come from that cusp in time after the RCA buyout of Cunningham. 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