Matched Pair RCA Radiotron Number / Type 89 #89 Vacuum Tubes Valves NOS-Testing December 31 2022 This lot of four of

This lot of four of GE black plate 6CL6 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box GE 12BL6 tubes tested to spec on our TV7/U

This matched quad of new old stock-testing Sylvania 7B6 tubes tested 1033 micromhos for Tube One and 1050 for Tube Two on our Hickok 800

These seven 6A6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

this unique -- and nicely-framed -- work of art captures the raw

Matched Pair RCA Radiotron Number / Type 89 #89 Vacuum Tubes Valves NOS-Testing December 31 2022 This lot of four ofThis matched pair of RCA Radiotron number 89 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They tested as follows: 56 and 58 where minimum (65%) is 395 and 100% is 60. These are great looking, well constructed tubes with Micanol bases; anode radiators for cooler operation and longer tube life and gray and silver bottles. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT