3 US-Made Number 27 #27 Vacuum Tubes Engraved Base Mesh Plate Thimble GetterLot Of Three AL8500 AL 8500 SD Tube One measured 30 while

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

copper support rods and graphite coatings for even electrostatic charge distribution and

Transconductance measured 60 for Tube One and 61 for Tube Two where minimum (65%) is 43 and 100% is 66

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 Tube One measured 30 whileThis 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