General Electric GE 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate

General Electric GE 5Y3 5Y3GT Vacuum Tube Rectifier Black PlateThis black plate GE 5Y3GT rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 50 55 where minimum (65%) is 40 40 and 100% is 62 62. It has a top, D getter, excellent flashing and 58 39 188 5 date factory codes. 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

There are five Sylvania 6N7 / 6N7 GT tubes in this lot

This lot of six Sylvania number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance measured 64/68 where minimum (65%) is 50/50 and 100% is 77/77

3 milliamps' plate current and measured 2060 micromhos

and their top mica spacers have two X patterns incised into them

This lot of four US-made black glass as well as gray glass number / type 57 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box US-made 6F5s tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured an underwhelming-but-well-balanced 40/42 where minimum (65%) is 50/50 and 100% is 77/77

5 volts with adapters (not included) and they sound tremendous even though they straddle the cusp and are running with a lowered filament voltage

excellent silkscreening and 312 639 provenance/date codes

sutured tops

This paperback book is in excellent condition