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Looking for some schematics for these radios with the pll upd858. All Am radios and dont need all just 1 of each if possible. Im looking for the 36.380 tripler crystal circuit location in the radio a copy of that location would be great if possible. I searched the internet and hard to find...

Well I just went down to my shop and checked something i saw on youtube. The 2n3771 regulator was not getting warm stone cold So I removed it and added some heat grease on the mica insulator and tightened the 2 little sockets that the regulator plugged into. Now the regulator was getting warm...

here is some more pictures

Looks like the output transistor is rated for 15 amps so I would say its a 10amp power supply

Howdy No name on supply or tag for specs I measured the volts 13.77 out if i put a small load the volts will drop to zero. the transistor on back im sure is the output says Astron on it so maybe an astron power supply. First time cover ever been off I looked for parts to be bad -burned or the...

I have a 13.5 volt power supply that is putting out the voltage but the amps are not there under a load the voltage will drop way down. What part should I look for to be bad or would it be 1 of the output transistors. Have not had time to check it out yet. thanks