First thing is to unplug the radio for any repairs then to replace the power supply capacitors, They are usually big and may be in a metal can(s) if you don't and they are shorted they will destroy the power transformer immediately on turn on. Or that may be the problem. to check that will require testing the windings of the power transformer. Don't test with the power on. to test the transformer you have to disconnect its wires first, make sure that you note where each of the wires was soldered to. Check the primary side and it should have a high resistance reading. then check each of the secondaries, low resistance on the filament winding(s) and High on the high voltage secondaries. of any of the windings are open. then you have to replace or toss out the transformer. at that point, there is no going forward.
Heres a schematic and troubleshooting chart.
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Click Here for Schematic
Read this on Phils old Radios Beginners intro to repairs Click Here
there are so many possibilities of trouble. Do you hear any noise or hum from the loudspeaker?
If so your sound section may be working. the next thing to try is taking a transistor radio and put it on top of the console. have both radios on at 1/4 volume. Put both radios at the center frequency (1000Khz) move console radio dial first, the frequency from one end of the scale to the other.
You should get a squeal on the transistor radio at some point. If so then your oscillator section is working.
If not then you have either a bad tube or no B+. You can also test the tube filaments for continuity.
Use an ohmmeter to check the resistance, if you get infinity it is an open filament. Then tube replacement is required.
You can check the speaker by using a small battery across the speaker terminals, if you here a clicking noise, its OK.
It gets a lot more complicated if you don't have experience in radio theory and repair. Especially if you don't have radio test equipment. There are many books online in free PDF form that you can download. Just for beginners. Try what I told you first. Let us know about your results.
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