3 US-Made Number 27 #27 Vacuum Tubes Engraved Base Mesh Plate Thimble GetterLot Of Three AL8500 AL 8500 SD red tip (low noise) 6CG7

red tip (low noise) 6CG7 / 6FQ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

double D getter

new in box GE 6DS4 tube tested to spec on our Paul Hart-calibrated TV7/U

Tube One: 71/69 and

Tube One measured 30 while Tube Two measured 32 where minimum (65%) is 22 and 100% is 49

3 US-Made Number 27 #27 Vacuum Tubes Engraved Base Mesh Plate Thimble GetterLot Of Three AL8500 AL 8500 SD red tip (low noise) 6CG7This lot of three US made Type 27 227 triodes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 20, 36 and 42, respectively, where minimum (65%) is 25 and 100% is 38. The tubes have round mesh plates; hot stamped bases and excellent flashing. Three have thimble getters while Tubes Three and Four have dimpled sheet getters. WE HAVE SCORES OF THOUSANDS OF VACUUM