11 US-Made Number Type 27 #27 Vacuum Tubes Valves Lot Of Eleven Ken-Rad Octal These 11 RCA gray glass

These 11 RCA gray glass 6D6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

but the spine is in fine shape with no loose pages

Tube One Transconductance: 45/45

25 out of 10

CHINA IS AN EXCELLENT EXAMPLE

11 US-Made Number Type 27 #27 Vacuum Tubes Valves Lot Of Eleven Ken-Rad Octal These 11 RCA gray glassThese eleven US made number type 27 tubes tested below the cusp some far below, but still usable especially in experimental situations where the tube might be damaged on our Paul Hart calibrated TV7 U. Transconductance readings are 15, 18, 18, 19, 21, 22, 22, 24, 24, 24 and 24 where minimum (65%) is 25 and 100% is 38. 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