Matched Pair RCA 6F6 JANCRC6F6 VT-66 Vacuum Tubes Milspec NOS-Testing Nagrania XL 0235 They are still stapled in

They are still stapled in their boxes

gray and silver coatings and an engraved / stamped base

Transconductance measured 32 for Tube One and 33 for Tube Two where minimum (65%) is 25

These eleven Philco type 24A mesh plate tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box RCA 6JU8A tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA 6F6 JANCRC6F6 VT-66 Vacuum Tubes Milspec NOS-Testing Nagrania XL 0235 They are still stapled inThis new old stock testing matched pair of milspec RCA JAN CRC 6F6 VT 66 tubes was tested on our Maxi Matcher 325 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One drew 27. 1 milliamps' plate current and measured 2060 micromhos while Tube Two measured 27. 2 2160 where new 6F6s measure from approximately 2000 micromhos with plate current draw in the 20s. These tubes both have 743 date