3 US-Made Number 27 #27 Vacuum Tubes Engraved Base Mesh Plate Thimble GetterLot Of Three AL8500 AL 8500 SD double D getter

double D getter

59 and 62 where minimum (65%) is 45

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

Tube One: 71/69 and

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

3 US-Made Number 27 #27 Vacuum Tubes Engraved Base Mesh Plate Thimble GetterLot Of Three AL8500 AL 8500 SD double D getterThis 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