Matched Pair RCA 6F6 6F6G Vacuum Tubes ST Shoulder Shape T33 for Backup Tube One measured 32 while

Tube One measured 32 while Tube Two measured 36 where minimum (65%) is 36

They measured (from left to right) 46

outstanding flashing and a P1 date code

round mica spacers and anode radiators for cooler tube operation and longer life

It measured 35/34 where minimum (65%) is 40/40 and 100% is 62/62

Matched Pair RCA 6F6 6F6G Vacuum Tubes ST Shoulder Shape T33 for Backup Tube One measured 32 whileThis matched pair of RCA MANUFACTURED 6F6G tubes was tested on our Maxi Matcher 325 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One (Emerson LABELED, RCA MANUFACTURED) drew 16. 6 milliamps' plate current and measured 1800 micromhos while Tube Two measured 17. 6 1780 where new 6F6s measure from approximately 2000 micromhos with plate current draw in the 20s. These tubes have 274 649