Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate

Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black PlateThis new old stock testing, black plate, milspec Sylvania 5Y3GT JAN CHS 5Y3GT VT197 A rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 48 52 where minimum (65%) is 40 40 and 100% is 62 62. It has a bottom, sheet getter, nice flashing for its type; a US Army Signal Corps anchor logo and a K4 date code. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT

but followed the original score and was recorded in the latter 1950s

crenelated top and bottom mica spacers

These six US-made 6S4A tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Tube Two has a narrow crack in its base which

This new old stock-testing matched pair of Sylvania 6AU6 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

5 record cleaner and then played it on my He-Man Rig which consists of a Rega Planar Three with an Ortofon X5-MC cartridge on an RB-300 tone arm with a Cern Audio Dual 6SN7 / 6SL7 phono preamp / preamp feeding my Bottlehead headphone amplifer driving Sennheaiser HD 580 cans

This septet of US-MANUFACTURED type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Fortunately the libretto is present and in great shape

This trio of Matsushita 11BM8 / LCL82 / 12DZ8 triode/pentodes was tested on our Paul Hart-calibrated TV7 for shorts

GM-LABELLED 6R7GT tubes in this lot

new in box US-made 6FG7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 59 for Tube One and 60 for Tube Two where minimum (65%) is 40