4 US-Made Number / Type 77 #77 Vacuum Tubes Bell Plate Variety Lot Of Four 6DW4 T32 5 volts with adapters (not

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

This hard cover book is in good condition

new in box US-made 12BR7 tubes tested to spec on our Paul Hart-calibrated TV7/U

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

3 milliamps' plate current while Tube Two drew 23

4 US-Made Number / Type 77 #77 Vacuum Tubes Bell Plate Variety Lot Of Four 6DW4 T32 5 volts with adapters (notThese 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