Matched Pair Silvertone 6K7 6K7GT Vacuum Tubes NOS-Testing ECF80 T28 This Tung-Sol 13DE7 tested to

This Tung-Sol 13DE7 tested to spec on our Paul Hart-calibrated TV7/U

Sentinel-BRANDED 5U4G rectifier tube tested a perfectly-balanced 57 in both sections on our Paul Hart-calibrated TV7/U where minimum (65%) is 40/40 and 100% is 62/62

This Raytheon 12AZ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

new in box RCA 21LU8 tube tested to spec on our Paul Hart-calibrated TV7/U

These tubes have copious bottom flashing

Matched Pair Silvertone 6K7 6K7GT Vacuum Tubes NOS-Testing ECF80 T28 This Tung-Sol 13DE7 tested toThis new old stock testing matched pair of Sylvania MANUFACTURED. Silvertone BRANDED 6K7GT tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas, Tube One measured 56 while Tube Two measured 57 were minimum (65%) is 36 and 100% is 55. 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