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M1225 4ch to 20ch?

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nh7cy
Posts: 387
Joined: Thu Aug 10, 2006 9:35 pm
What radios do you own?: one of each

M1225 4ch to 20ch?

Postby nh7cy » Wed Apr 30, 2014 7:21 pm

I believe I saw an old (2003ish) post on this but it had never been answered.

Is it possible to convert a 4ch M1225 to a 20ch M1225 with the proper software / hardware?

I only ask as I have a good 4ch radio and a 20ch parts radio with a bad board but a good head.
Jason B
Operating VHF AM mobile - On the air, In the air.

Al
Posts: 1045
Joined: Tue Sep 04, 2001 4:00 pm

Re: M1225 4ch to 20ch?

Postby Al » Wed Apr 30, 2014 7:31 pm

Because you can't access the firmware you can't change to a 20 channel without replacing the uP and possibly adding RAM storage to the main board. I believe the uP with its internal ROM was a mask programmed part for either the 4 channel or 20 channel and they were different.

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d119
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Joined: Tue Mar 19, 2002 4:00 pm

Re: M1225 4ch to 20ch?

Postby d119 » Sun May 04, 2014 7:38 am

That sounds correct to me. I think the same issue applies to the P1225. I've never seen a modification to turn a 2CH unit into a 16CH unit.

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nh7cy
Posts: 387
Joined: Thu Aug 10, 2006 9:35 pm
What radios do you own?: one of each

Re: M1225 4ch to 20ch?

Postby nh7cy » Thu May 08, 2014 12:27 pm

Figured it wouldn't be that easy. Thanks for the info!
Jason B
Operating VHF AM mobile - On the air, In the air.


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