7F7 dual triode tube rca ~ tested good

UpUp


Subject: 7F7 dual triode tube rca ~ tested good
This 7F7 duotriode tube has been stored away for years. Loktal version of 6SL7. Made by RCA in the U.S.A. White boxed. Tested as good on Hickok tester: 1500/1350 in mutual conductance on triode1/triode2 where 1300/1300 is average new.


(Click on the thumbnail images to enlarge)

Counter