Matched Pair General Electric GE 6005 6AQ5 Black Plate Vacuum Tubes Ken-Rad Mini 2013 Fortunately they are inert and

Fortunately they are inert and don't affect the tubes's operation

new in box 11FY7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 57 for Tube One and 65 for Tube Two where minimum (65%) is 36 and 100% is 55

This lot of three National Union number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

It is new old stock and new in box

Matched Pair General Electric GE 6005 6AQ5 Black Plate Vacuum Tubes Ken-Rad Mini 2013 Fortunately they are inert andThis matched pair of GE black plate 6005 6AQ5 output tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 64 while Tube Two measured 66 where minimum (65%) is 46 and 100% is 71. These tubes have stout, shiny, ribbed black plates and stout O getters as well. It took two adapters but was worth it as they sounded fine in my Mini 2013. WE HAVE SCORES OF THOUSANDS OF VACUUM