General Electric GE 6AQ5 Vacuum Tube Black Plate

General Electric GE 6AQ5 Vacuum Tube Black PlateThis beautiful GE 6AQ5 black plate output tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 60 where minimum (65%) is 46 and 100% is 71. This tube has horizontally ribbed black plates; copper support rods; excellent flashing; a horseshoe getter; an anode radiator for cooler operation and extended tube life. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE

6/1980 where new 6F6s measure from approximately 2000 micromhos with plate current draw in the 20s

This matched trio of Sylvania 12BY7 / 12BY7A tubes was tested on our Paul Hart-calibrated TV7 for shorts

WE CANNOT GUARANTEE FOR FAILURES

They have shoulder / ST bottles

I am playing them as I write in one of my Mini Mite 2013 with the Mobile Fidelity version of Pink Floyd's "Live At Montreux" and they sound great

an oak leaf base

This GE 3B7 / 1291 tube tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 68/64 where minimum (65%) is 36/36

52/52 and 53/53 where minimum (65%) is 40/40

Transconductance was 1670 for Tube One and 1560 for Tube Two where new/nominal is within one standard deviation of 1900

I have played it in my Bottlehead Crack headphone amplifier and it sounds great

I have played it in one of my Radio Craftsmen RC-2 monoblocks (with an adapter