09-07-2012, 10:38 PM
On a smaller AC set like this you can use the Pi filter trick with a wire wound resistor, however I would not recommend it for a higher tube count set with 8 or more tubes. The reason being is that in a larger tube count radio the B+ current draw will be higher so if you use a resistor the filter caps will discharge more resulting in a lower B+ voltage.
Regards
Arran
Regards
Arran