RCA Radiotron Number Type 80 Vacuum Tube Rectifier Black Plates Shoulder ST Shape Hanging Filaments 6AC7 Octal Metal Transconductance measured 2850 micromhos for

Transconductance measured 2850 micromhos for Tube One with a current draw of 21

Transconductance was 1900 for Tube One and 1800 for Tube Two where new/nominal is within one standard deviation of 1900

Tube One (missing centering pin / keyway): Tube Two:

THIS IS NOT AMAZON

RCA Radiotron Number Type 80 Vacuum Tube Rectifier Black Plates Shoulder ST Shape Hanging Filaments 6AC7 Octal Metal Transconductance measured 2850 micromhos forThis RCA Radiotron number type 80 rectifier tube was tested on our Paul Hart calibrated TV7 U. It measured 50 46 where minimum (65%) is 40 40 and 100% is 62 62. It has a dimpled sheet getter; mica snubbers; an silkscreened base; hanging filaments and outstanding flashing. 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