Hi,I just bought a Philco 41-603 to restore. The first thing I did was replace the power cord and turn on the radio. All I got was a loud hum.Do you have any suggestions? How do I bring up photos posted.
Philco 22
You are better off creating a separate thread.
For the future: it is always better first to ask question like this one and only then power on radios provided this would be recommended. Usually this is absolutely NOT something you want to do.
I will wait until this is moved to a new thread, then we can continue.
First things first.
Try to locate (maybe Ron can give you a/the link) numerous discussion that tell you what to do to a newly acquired old radio that either has not been restored or the restoration is being questioned.
Basically, you do not power the radio until:
1. You verified that the caps (all of them preferably but as a minimum all electrolytics) have been replaced.
2. You check everything for shorts.
3. You inspected your power cord and replaced it if necessary.
4. You checked your transformer output using a Variac.
5. You checked your tubes.
6. You checked your rectifier output.
Then you can bring it up using a Variac, measure the voltages...etc.
Thanks Ron.
Philco 22, now go do the homework; if you have questions along the way, we here will be glad to help.
You are all right it is a Philco 41-603 Radio / phonograph. I will check the tubes first,then look for shorts. Thanks for the advice. Tim
I have started to replace the caps and the old electrolytic cap is 20 mfd. It has a red positive at one end and a black negative and a yellow positive at the other end. I have a new cap
that is 22 uf with 450 volts that has one positive wire and one negative wire. I know that the
new cap negative has to go to the negative on the radio. how do I wire the two positive
wires ?
Tim
You cannot wire it just like that. One is a dual cap and the other is a single with negative not directly connected to the can. You need two of those to replace one of the original.