3 NEC EL84 6BQ5 Vacuum Tubes Lot Of Three 76 Gebraucht 2/2160 where new 6F6s measure

2/2160 where new 6F6s measure from approximately 2000 micromhos with plate current draw in the 20s

This softcover book is in excellent condition

These three new old stock

new in box Ken-Rad 6R7 tube tested to spec on our Paul Hart-calibrated TV7/U

3 NEC EL84 6BQ5 Vacuum Tubes Lot Of Three 76 Gebraucht 2/2160 where new 6F6s measureThese three NEC (Japan) O getter 6BQ5 EL84 output tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 14 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 6740 micromhos for Tube One; 7140 for Tube Two and 7700 for Tube Three. Plate current draw was 24, 30 and 37. 4 milliamps, respectively. (New Russian EL84s typically test from the mid 20s to mid 60s with transconductance