4 US-Made Number / Type 77 #77 Vacuum Tubes Bell Plate Variety Lot Of Four 6DW4 T32 new in box Sylvania 10GK6

new in box Sylvania 10GK6 tubes tested to spec on our Paul Hart-calibrated TV7/U

5 volts with adapters (not included) and they sound tremendous even though they are running with a lowered filament voltage

This tube has two additional vertical support rods

new in box Sylvania 6A5G tube tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 74/76 while Tube Two measured 76/76

4 US-Made Number / Type 77 #77 Vacuum Tubes Bell Plate Variety Lot Of Four 6DW4 T32 new in box Sylvania 10GK6These four US made belll plate number type 77 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas. They tested (from left to right) 36, 38, 42 and 42 where minimum (65%) is 31. 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 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY