Motorola CDM 1550 LS walkthrough for MMDVM and Pi-Star 

It's the 1st radio that has the modified band edges (S-split is originally 450-512 [or 520]); 2nd radio (R-split) is 403-470 from the factory; no mod necessary.

I was just wondering if you ever got around to making that video about Day 1 from purchasing the radio to getting it up and running? I have a CDM 1250 also and I can’t find any good basic videos about programming. It’s for 2 m use. That would be super helpful!

To keep radios on after power outrage need to bridge a couple of pins on the rear connector

Have same parts on my dmr repeater, but with the first pi hat shown... And same here, adjusting the pots is difficult, when you move them one side some handies do not work and viceversa

Try disabling all emphasis on channels config

Hello, How can I set the classic Motorola courtesy tone when I release the PTT on my CDM 1550? Thanks!

Do you have the YT link on how to modify the band width of the radios?

Where did you get the Motorola cps at? I’ve been looking for that software but can’t find it.

What is the program called and where did you get it?

Does this work to get a DMR to rebroadcast with MDC?

I'd like to have the configuration n' setting for this 'cause i got those radios, tks!

Nicely done. Any chance of a listing of Pi parts used? I could easily source some Warris series mobiles (likely GM339 here but a chance of 338 or 328) and look at making something like this. I'm wondering how the old Radius GM300/M120 would go doing this, though finding narrowband in them was like pulling hens teeth since most stuff here back then was Tait or Philips FM900/PRM80.

Thanks for the vid ;-) will be looking for updates ;-) M3DAF ;-)

How did you obtain a COR/COS voltage from the radio?

You’re better off getting a surecom sr328 repeater controller it would work a hell of a lot better and it would be less bulky along with being less expensive

:)