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Just bought 37-620 want to get it working
#3

Doc, always nice to post a link to your schematic so others can have a quick reference to what your working on.  A rather complex radio if this is your first.  Welcome,  a lot of help here to get it working well.  Schematic link attached. Yes, it will need an external antenna for good short wave reception. As for the caps inside the metal cans they would be the first to replace before ever trying to power up the radio. In general, a good "health check" on the radio should be a priority, specifically resistance checks on the output transformer and field coil. Also the power transformer with the rectifier pulled to measure filament voltages and HV measurements. Nice to have these confirmed as good prior to proceeding. Many threads outlining how to proceed. Those electrolytic caps in metal cans can be handled in a couple of ways. One if there is room underneath the radio is to attach a new terminal strip and cut the wires off the bottom of the cans and set up the terminal strip with the new caps on it. The second is to put new caps inside the metal can (restuff) a little more challenging but leaves the underside of the radio looking original. There are numerous threads on how to do this as well. Look at the attached schematic and determine what tube was taped over. If the socket is there, there was a tube. Could be the rectifier (tube) was replaced with a couple small diodes for some reason.
Best,  Jerry

http://www.nostalgiaair.org/PagesByModel...013212.pdf

As a PS, I strongly recommend going to this site and ordering the proper readable and complete set of schematics for your radio. I never start a Philco project without contacting Chuck and getting complete information on the model.

http://www.philcorepairbench.com/schematics.htm

A friend in need is a pest!  Bill Slee ca 1970.


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RE: Just bought 37-620 want to get it working - by jerryhawthorne - 09-22-2014, 01:27 PM



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