[R-390] 3tf7

[Steve Hobensack]

I took two 6ba6 tubes,ac milliamp meter, rheostat, 25vac power supply and 
hooked it all in a series on my test bench. I adjusted the current to 0.3 
amp. I made up another set-up with a diode in place of the rheostat. Both 
set-ups were operating at the same time. The set-up with the diode resulted 
in brighter filaments than the set-up limited to 0.3 amp.
Merry Christmas .....Steve...KJ8L





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