--- Brian K Harris <[EMAIL PROTECTED]> wrote: > > The tubes all have 2V filaments. The radio has two > inputs for a filament > supply, 2V or 2.5V (the 2.5V input merely inserts a > series resistor). My > question is....why did anyone manufacture 2V > filament tubes and what kind > of battery put out 2V or 2.5V? I am building a > solid state supply for the > 2V requirement as well so the question is merely to > satisfy my curiosity.
A wet cell. You will have to have very good filtering on the filament supply to avoid hum as the filament is also the cathode. Dave, VE1ADH > __________________________________________________________ Find your next car at http://autos.yahoo.ca