5 Philco Number Type 37 #37 Vacuum Tubes Valves Black Plate Shoulder ST Shape Lot Of Five Azia Records new in box International Servicemaster

new in box International Servicemaster 19CG8 tube tested to spec on our Paul Hart-calibrated TV7/U

6 dB / -82

Tube One measured 1690 micromhos and drew 19

This is a well-preserved LP

5 Philco Number Type 37 #37 Vacuum Tubes Valves Black Plate Shoulder ST Shape Lot Of Five Azia Records new in box International ServicemasterThese five Philco Type 37 triodes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 18, 20, 26, 30 and 3o where minimum (65%) is 23. They have black dark gray plates; dimpled sheet getters; old fashioned, coke bottle shape glass envelopes and terrific flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER