TRC-465 no modulation...wrong mic?

[press1280]

I have a TRC-465 that transmits/receives but doesn't seem to modulate. I have 2 "Realistic" mics, both did the same thing. I did pop open the radio and I don't see anything loose...all the contacts have continuity through a little board right behind the mic connector and to the 3 wires that come out of the board.
But I see that this particular mic wasn't what was originally with the 465, it was the sort of square mic with the "RS" on the front(these seem to be on most models of that era). I thought these mics were basically interchangeable, but perhaps they aren't?
Checking the model number of the mic I have looks like it was to a TRC-479 https://cbtricks.org/radios/realistic/trc_479/graphics/realistic_trc_479_sm_pg35_36_sch.pdf
But this doesn't look like the "RS" square type https://cbtricks.org/mic_manuals/realistic/realistic_21_1172_mic.pdf
Maybe that's the issue?

 

[kc2asb]

I've owned a number of Realistic CB radios over the years, and they all had the 5-pin DIN plug for the microphones. I could swap mics between a Realistic Navaho from the 70's with one made in the 90's and never had any issues.

I looked at the TRC-465. It appears to be a Uniden PC-122 with Realistic/Radio Shack badging. It uses a 5-pin DIN plug, though, like all other Realistic CB's of that time.

I'm not sure what the issue is with your radio, but since you tried two different Realistic mics, I doubt it is a mic issue. Sorry I could not be of more help

 

[press1280]

I've owned a number of Realistic CB radios over the years, and they all had the 5-pin DIN plug for the microphones. I could swap mics between a Realistic Navaho from the 70's with one made in the 90's and never had any issues.

I looked at the TRC-465. It appears to be a Uniden PC-122 with Realistic/Radio Shack badging. It uses a 5-pin DIN plug, though, like all other Realistic CB's of that time.

I'm not sure what the issue is with your radio, but since you tried two different Realistic mics, I doubt it is a mic issue. Sorry I could not be of more help

I pretty much figured that was the case but was hoping otherwise.
Guess I’ll have to dig around some more.