Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods Vintage Parts EIA Factory Codes: RCA logo

EIA Factory Codes: RCA logo

This new old stock-testing matched pair of Shuguang 6L6WGC output tubes was tested on our Maxi-Matcher 2 for shorts

72 and 76 where minimum (65%) is 45

This new old stock-testing matched pair of milspec RCA 1619 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Pictures Three and Four are included to underscore this fact

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods Vintage Parts EIA Factory Codes: RCA logoThis matched pair of GE 6SN7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 53 53 for Tube One and 56 56 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have 4 48 188 5 and 4 43 188 20 date factory codes; copper support rods, horseshoe getters and excellent flashing. I have played them in my Cern Audio phono preamp and they