Sylvania 6BQ5 EL84 Vacuum Tube Black Plate O Getter NOS-Testing RCA 6MU8 NOS NIB Just a few pops and

Just a few pops and ticks in the quietest passages

new in box GE 20AQ3 / LY88 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 6J6 / 6J6A tubes tested to spec on our Paul Hart-calibrated TV7/U

77/52 and 82/48 where minimum (65%) is 50/40

Sylvania 6BQ5 EL84 Vacuum Tube Black Plate O Getter NOS-Testing RCA 6MU8 NOS NIB Just a few pops andThis Sylvania 6BQ5 EL84 output tube was 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 8800 micromhos and late current draw was 48. 4 milliamps where new Russian EL84s typically test from the mid 20s to mid 60s with transconductance from 5000 micromhos. This tube has shiny black plates, a top O getter, copper support rods and