5 US-Made 89 / 89Y Vacuum Tubes NOS-Testing Lot Of Five Debby Boone new in National Union 1625

new in National Union 1625 / VT-136 tested to spec on our Paul Hart-calibrated TV7/U

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

It also sounded great in my Schiit Audio Vali 2 headphone amplifier

round mica spacers and anode radiators for cooler tube operation and longer life

glass chip inside

5 US-Made 89 / 89Y Vacuum Tubes NOS-Testing Lot Of Five Debby Boone new in National Union 1625This 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