Matched Pair RCA-Cunningham 6K7 Vacuum Tubes Engraved Bottles NOS-Testing Type Sextal T06

Matched Pair RCA-Cunningham 6K7 Vacuum Tubes Engraved Bottles NOS-Testing Type Sextal T06This new old stock testing, perfectly matched pair of RCA Cunningham 6K7 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Both measured 54 were minimum (65%) is 36 and 100% is 55. These tubes have engraved bottles. 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

Tube One measured 1770 micromhos

new in box RCA 17CU5 / 17C5 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box milspec RCA 3Q4 / JAN3Q4 tube tested to spec on our Paul Hart-calibrated TV7/U

64 and 65 where minimum (65%) is 40

This Sylvania 5U4G rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

There are two new old stock

These eight Philco 7B8 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 29 and 100% is 45:

They are dead quiet when the CD player is muted and have excellent frequency response

These seven Philco 24 globe

These five US-made

high signal-to-noise-ratio and very smooth album

This new old stock-testing matched pair of RCA 6BL7GTA dual triodes was tested on our TV7/U for shorts