Sylvania 5Y4 5Y4G Vacuum Tube Black Plate Rectifier Shoulder ST-Shape Colors Of The Day There are nine new old

There are nine new old stock

Transconductance measured 2340 micromhos with a plate current draw of 24

There were no shorts or gas and transconductance measured as follows:

These three new old stock-testing US-made 1H4G tubes were tested on our Paul Hart-calibrated TV7/U for shorts

It rattles but is otherwise OK

Sylvania 5Y4 5Y4G Vacuum Tube Black Plate Rectifier Shoulder ST-Shape Colors Of The Day There are nine new oldThis Sylvania 5Y4G rectifier tube tested 62 54 where minimum (65%) is 40 40 and 100% is 62 62. It has the nostalgic shoulder Coke bottle glass envelope; a round, top mica spacer with wire snubbers; a bottom, dimpled sheet getter; nice flashing and lightly ribbed, black plates. 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