Matched Pair RCA 6F6 JANCRC6F6 VT-66 Vacuum Tubes Milspec NOS-Testing Nagrania XL 0235 Transconductance measured 32 for Tube

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

GE-LABELED 6AQ8 / ECC85 tube was 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

This lot of three US-made 7F7 tubes was tested on our Paul Hart-calibrated TV7/U and measure as follows:

sutured tops and excellent flashing

Matched Pair RCA 6F6 JANCRC6F6 VT-66 Vacuum Tubes Milspec NOS-Testing Nagrania XL 0235 Transconductance measured 32 for TubeThis 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