3 NEC EL84 6BQ5 Vacuum Tubes Lot Of Three 76 Gebraucht bottom D getters

bottom D getters

This softcover book is in excellent condition

This new in box JJ 6BQ5 was tested on our Maxi-Matcher with 325 volts on the plates and a bias of -14 volts for shorts

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

They have V3

3 NEC EL84 6BQ5 Vacuum Tubes Lot Of Three 76 Gebraucht bottom D gettersThese 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