Sylvania 6BQ5 EL84 Vacuum Tube Black Plate O Getter NOS-Testing RCA 6MU8 NOS NIB Etsy will indicate the number

Etsy will indicate the number available in this Dutch Auction

new in box 6K5GT tubes tested to spec on our Paul Hart-calibrated TV7/U

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

This matched pair of RCA 12SL7GT dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

It measured 32/27 where minimum (65%) is 18/18 and 100% is 28/28

Sylvania 6BQ5 EL84 Vacuum Tube Black Plate O Getter NOS-Testing RCA 6MU8 NOS NIB Etsy will indicate the numberThis 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