GM 1200 M01RFM9CK5AN conversation to HAM (UHF)

[funky4792]

Has anybody information about converting these German Trunk Radio
to conventional single channels for HAM use ?

This version seems to be an special german device, is it possible
to activate the conventional single channels ?

Thanks for Answer

[elkbow]

Converting a GM/GP1200 trunked radio into a conventional MT/MTS2100 radio

The GM/GP1200 (Jedi) trunked radio can be converted easy into a MTS/MCS2100 (European) Skywalker radio. This is great for ham use, you can have up to 250 conventional channels. The GM/GP1200 have only 10 and some trunking channels!

For this you need the 2100 series RSS, the 2100 series upgrade tool, MTSX LAB or ASTRO LAB RSS, and a modified RIB.

The modified RIB is just a standard RIB with some minor changes. A schematic showing the changes can be found here. This modified RIB has a switch to change between normal and modified mode.

Create a codeplug with the 2100 series RSS for your GM/GP1200 (have a look for the same band, bandwith, display etc.). Save this codeplug to disk and rename to something like "default.ds". Now start the MTSX LAB RSS and load the file with no unpack. Connect the GM/GP1200 with a standard RIB and write the codeplug with no pack/unpack.

Now the the radio will give you an Error 2, but don´t worry. Switch the radio off and connect it with the modified RIB and service cable. Attention: The flashing voltage must be 13V +-0.5V. Use the modified RIB only for flashing the radio.

Start the 2100 series upgrade tool and turn the radio on. Start the flashing process and flash the radio. After flashing, retune the radio with the 2100 series RSS, and fill in the frequencies you need.

Now you have a radio with up to 250 channels with PL and select-5 (DTMF is possible too, if your radio has a keypad). This all is only possible because the 2100 series RSS can create native codeplugs.

Now the second part of the story... You can even do this with a MTS/MCS2000 American radio (even if your radio has a toolproof error!). You can only convert or reactivate radios, working in the 4m, 2m or 70cm band. After the conversation your radio is a 2100 series radio and can only configured/tuned with the 2100 series RSS. No SMARTRIB and dongle is needed for this procedure.

[Ed]

It *has* the possibilities to program 10 conventional channels in the German gm1200. When in start-up mode you can select "conventional mode". You need to programm it with the sub-D connector. Works fine here, also the MCX1200.

[ct1fhw]

HI every one!!

during thr flash process I heard that I have to BOOTstrap the radio, I is true?
And how do I do it?

[motorola_otaku]

HI every one!!

during thr flash process I heard that I have to BOOTstrap the radio, I is true?
And how do I do it?

Yes, the modification to the RIB takes care of that. See here: http://batlabs.com/images/unirib.gif

Be warned, the 2100 upgrade tool is not readily available.

edit: Another annoying trait these radios have in common with the rest of the European Jedi radios: no DPL.