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Radio, repair or replace?

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Dana

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So my new plane came with an old Narco 11B com radio. Worked fine, until I changed the frequency... I can turn the tenths knob and it clicks, but the frequency indicator doesn't move. From what I've researched it appears the plastic gears inside tend to wear out, though I haven't yet taken it apart to look at it. Anybody familiar with these, or know of a parts source?

The interim solution, I guess, is to remove the radio and put a handheld in its place. Another option is to pull the King KY97 out of my Starduster project. I could get a TKM drop in replacement, but the $1800 price tag doesn't sound too attractive.
 

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