National Union NU 6F6 6F6G Vacuum Tube ST Shoulder Shape NOS-Testing 12AX7 5 standard deviations of 3600

5 standard deviations of 3600 micromhos like their 12AT7 cousins)

new in box Sylvania 6FV6 tested to spec on our Paul Hart-calibrated TV7/U

nicely-matched pair of General Electric 12AU7/ECC82 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

They measured 29 and 31 where minimum (65%) is 22 and 100% is 40

steel support rods and gray plates

National Union NU 6F6 6F6G Vacuum Tube ST Shoulder Shape NOS-Testing 12AX7 5 standard deviations of 3600This NOS testing National Union 6F6G output tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 76 where minimum (65%) is 50 and 100% is 77. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST