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I know the radio works. Before I sold my TRC-448, I used the mic (21-1172) from it, and it worked.

Then I bought a used 21-1172 and it didn't work, then tried a 21-1177 and it too didn't work. Both mics still had their factory 5 pin plugs on them.

[QUOTE="Turbo T, post: 391742, member: 17395"] I know the radio works. Before I sold my TRC-448, I used the mic (21-1172) from it, and it worked. Then I bought a used 21-1172 and it didn't work, then tried a 21-1177 and it too didn't work. Both mics still had their factory 5 pin plugs on them. [/QUOTE]

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