CBS-Hytron 5Y3 USNCHY5Y3WGTA Vacuum Tube Black Plate Milspec Triple 3 Mica Micanol Base 12Q7GT Grid Cap 3 rather than 12

3 rather than 12

Transconductance measured 44 and 48 where minimum (65%) is 35

Tube One drew 16

These tubes have acid-etched codes and designations as well as silk-screened 67-05 67-22 188-5 and 68-26 188-5 67-50 production run/provenance codes

This matched pair of Sylvania black plate 6CL6 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

CBS-Hytron 5Y3 USNCHY5Y3WGTA Vacuum Tube Black Plate Milspec Triple 3 Mica Micanol Base 12Q7GT Grid Cap 3 rather than 12This milspec CBS Hytron USN CHY 5Y3WGTA 5Y3 black plate rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 60 57 where minimum (65%) is 40 40 and 100% is 62 62. This tube is built like a tank and in great shape as well. It is massively reinforced against vibration with three mica spacers as well as top wire snubbers; it has a top D getter: a micanol base for