Quote:
Originally Posted by fumplet
yep looked up a philco 37-33 schematic. It just describes plugging the tube into the philco battery. I didnt see an actual schematical reference or the actual tube in circuit. I'll figure out some use for it
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I have a Philco model 643 that uses a 1A1 four prong regulator tube. It has an empty socket marked 1A1, that has a metal jumper in the socket, that originally came with the set. Evidently, the set was always used with a 2 volt wet cell.
There has been a whole range of 1-1 tubes of this type 1A1, B,C, etc.
Information from an old Alfred Ghirardi radio book, dated May 1943.
