5 US-Made 89 / 89Y Vacuum Tubes NOS-Testing Lot Of Five Debby Boone new in box US-made 5J6

new in box US-made 5J6 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box black plate Sylvania 9LA6 tube tested to spec on our Paul Hart-calibrated TV7/U

This book is in excellent condition

glass chip inside

These thirteen US-made 5T8 tubes tested to spec on our Paul Hart-calibrated TV7/U

5 US-Made 89 / 89Y Vacuum Tubes NOS-Testing Lot Of Five Debby Boone new in box US-made 5J6This lot of five new old stock TESTING US made 89 89Y tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts as gas and they measured as follows: 59, 59 60, 64 and 64 where minimum (65%) is 39 and 100% is 60. 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