I am slowly building an amp for hf using a GS35B. For several reasons I
decided to feed the filaments with current regulated d.c. I have the
circuit all designed and it regulates well. But the question is what
current should I use? The spec sheet for the tubes gives a range of
current to be expected when using the specified 12.6 volts for the
filaments. I suppose that there is some variation in filament current draw
from tube to tube. My inclination is to adjust the current so that the
voltage across the tube is 12.6 volts. Does this seem like the correct
thing to do?
Bob W4AOS
--
==========================================================
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|