Matched Pair RCA 6K7 Vacuum Tubes NOS-Testing Compactron TA2 There is a crack in

There is a crack in the base

but not in guitar amps and other environments with loud noise and/or excessive vibration

These tubes have steel support rods and top

This DVD / CD combination plays fine

They have late 1930s retro styling with coke bottle glass envelopes and mesh plates

Matched Pair RCA 6K7 Vacuum Tubes NOS-Testing Compactron TA2 There is a crack inThis new old stock testing, perfectly matched pair of RCA 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 large logos; and Tube One has a TE4 date code. 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