Get a soldering iron, turn on the radio and start heating components until
it quits. Replace the one that caused it. Normally it will be a capacitor
that is the problem.

Sorta like tune for maximum smoke and replace all charred components. ;)
"Nick" wrote in message
...
My mothers friend wants me to try and fix a older Bearcat scanner
model 250 that shuts down after being on about 20 minutes. After the
cool down it seems fine. Everything works well otherwise. What to look
and change for myself help is appreciated. Nick