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http://www.worldwidedx.com/cb-band-cb-radios/23179-realistic-trc-448-am-ssb.html

Lotsa info right there.

It may be a transistor in the Audio circuit, since it doesn't use an IC.

I have one of these radios in my junk pile. No output transistors; uses the rare 1307 & 1306 final/driver.

Might be able to be changed over to a 2166 and 1969 driver/final.
Perhaps MOSFET's too.

[QUOTE="Robb, post: 379244, member: 8446"] [url]http://www.worldwidedx.com/cb-band-cb-radios/23179-realistic-trc-448-am-ssb.html[/url] Lotsa info right there. It may be a transistor in the Audio circuit, since it doesn't use an IC. I have one of these radios in my junk pile. No output transistors; uses the rare 1307 & 1306 final/driver. Might be able to be changed over to a 2166 and 1969 driver/final. Perhaps MOSFET's too. [/QUOTE]

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