RCA Cunningham Radiotron Number Type 80 Vacuum Tube Rectifier Black Plates Engraved Base Shoulder ST Shape Hanging Filaments

RCA Cunningham Radiotron Number Type 80 Vacuum Tube Rectifier Black Plates Engraved Base Shoulder ST Shape Hanging FilamentsThis RCA Cunningham Radiotron number type 80 rectifier tube was tested on our Paul Hart calibrated TV7 U. It measured 35 34 where minimum (65%) is 40 40 and 100% is 62 62. It teats below spec but should work fine in many applications. It has a dimpled sheet getter; mica snubbers; an engraved 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

This lot of three Matsushita 8FQ7 / 8CG7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance measured 64 for Tube One and 68 for Tube Two tubes where minimum (65%) is 40

I am playing them in my single-ended Mini Mite (with two sets of adapters

similar tube and it sounds terrific

mica snubbers

winged plates with one rectangular hole per plate

Tube One drew 21 milliamps' plate current while Tube Two drew 22

The dust jacket shows some wear

Tube One measured 30 while Tube Two measured 32 where minimum (65%) is 22

new in box Sylvania 12JT6A tube tested to spec on our Paul Hart-calibrated TV7/U

This West German Amperex-MANUFACTURED

new in box matched pair of Raytheon 6SD7GT / JAN-CRP-6SD7GT pentodes was tested on our Paul Hart-calibrated TV7 for shorts