Matched Pair RCA-Cunningham 6K7 Vacuum Tubes Engraved Bottles NOS-Testing 3BC5 T35 This lot of four Sylvania

This lot of four Sylvania 12Q7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

This album is in excellent shape with only a few pops and ticks

One was made in the Netherlands and the other

new in box RCA 6LY8 tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA-Cunningham 6K7 Vacuum Tubes Engraved Bottles NOS-Testing 3BC5 T35 This lot of four SylvaniaThis 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 58 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