HMN 1035c mic disassembly

[k9wkj]

how do these come apart?
no screws at all
cable comes off and the rest is one glued together thing?

got one that needs a thorough scrubbing and im stuck on how

 

[arlo]

Some people say to put the mic in a vise and squeeze until it pops apart. Reglue to close.

 

[Project25_MASTR]

It's a sealed microphone. Either pop it open and glue it back together or spend the $40-$50 on a new one. If it's the modular jack version.


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[k9wkj]

well it works just fine
but pretty grungy

ohh well thanks for the advice

 

[KG4INW]

This excellent article shows a method for cutting an HMN1056D apart, which is the same design only smaller (scroll down a little ways): Hang-Up Mechanisms Used By Motorola Hand Microphones

 

[N4KVE]

Can't you clean the outside of the mike without taking it apart? While the article was informative, these mikes are always going for $5 at local hamfests. I'm looking at 2 mint ones that I'd give to you for free if you were local.

 

[KG4INW]

That's a good point, they're readily available used for prices far lower than new.

 

[jim202]

I have always used a stiff toothbrush and some alcohol to clean the mics I have. Then use a damp rag or paper towel to clean up whats left. Even my 5 year old grand child can do it.

 

[cmdrwill]

Use mild dish soap. These mics can be damaged by too much washing, they are NOT sealed..

 

[k9wkj]

all cleaned up
just used mild soap and hot water and toothy brush
not as good as new, but not afraid to hold next to my face!

now if i could find someone to talk too on 6m FM :roll:

i have 2 lowband maratracs this maxtrac (now 32 channel) and another coming!

 

[Oliner67]

On this note, I have one of these mics, which I use on an old mobile Radius. It's from the generation of radios where you had to jump the connection on the back of the mic to keep the monitor mode from turning on.

The person who sold me the mic had jumped the connection from somewhere internal, but the wire has since broken off.

Does anyone know how this is done? Permanently jumping the connection? I've tried wrapping copper wire around the mic clip but it did not work.

 

[N4KVE]

Inside the mike is a wire that connects to the inside of the hang up clip. When you open the mike, & remove the wire from the hang up clip, ground it to the circuit board. This will enable PL decode full time, which in my case, for ham radio use is fine. Of course, if you are using this mike on a community repeater, with many users all using different PL tones, do not modify the mike.

 

[Oliner67]

Thank you for the reply.

It's not for ham use, it's a radio in use where I work part time. Its not on any community repeater frequencies (or on any repeater). Old equipment that occassionally has issues.

So I guess the best method is the freezer trick?

 

[Oliner67]

Any chance of crossing two of the wires on the end of the mic cable to do the same effect? (Where it meets the radio?)

 

[SteveC0625]

Any chance of crossing two of the wires on the end of the mic cable to do the same effect? (Where it meets the radio?)

Yes, you can do that, too.

Schematics and pinouts are available at batlabs.com

It's an easy fix.

 

[Oliner67]

Thank you to everyone who replied, I much appreciate the help. Will update on how it goes. I prefer not to open the mic if I don't have to.

 

[Oliner67]

So I believe this is the correct diagram.

http://batlabs.com/images/maxrad.gif

If I understand correctly, I have to connect 13 (hook) to 10 (ground). Blk/red to yellow.

 

[SteveC0625]

So I believe this is the correct diagram.

http://batlabs.com/images/maxrad.gif

If I understand correctly, I have to connect 13 (hook) to 10 (ground). Blk/red to yellow.

I'm not sure why you would want to work on the logic board end. It's much easier just to jumper 3 and 4 at the mic connector. The logic board is inside the radio.

If you don't have any experience or the tools for working on RJ-45 connectors, you'll need to find someone who does. Or buy some parts and build an inline adapter.

 

[Oliner67]

Thanks for the help, time to get on YouTube for some tutorials.

Is there any easy way to jump the jack?

 

[SteveC0625]

Thanks for the help, time to get on YouTube for some tutorials.

Is there any easy way to jump the jack?

The easiest way, if you have the tools, is to chop off the RJ-45 and install a new one with the jumper wired in.

Failing that, you'd have to chop into the mic cable and expose the two wires, strip them, jumper them, insulate, and then close it up. No matter how neatly done, it would still be a kludge and likely cause issues later.

Or, build an adapter. All the pieces are available at Home Depot or Lowes. All you need is an RJ-45 surface mount wall jack, and a shorty Cat-5 cable. Chop the cable, wire it to the jack with the jumper added. Plug your mic into the jack and the cable into the radio. No surgery on the mic required.