I recently decided to finally install my FTM-10SR radio on the Multistrada 1200. The only catch is that I wanted to integrate it with the Starcom1 Digital intercom system I had purchased.
[more notes to come]
I had quite a bit of trouble getting this working and it isn’t finished just yet. I still have to tune the trimmers for best audio and finish moving the antennas to their final home, but in the interest of starting to document all this – here is the schematic for the build. The intercom manufacturer indicated that the radio was completely incompatible with the intercom – which I refused to believe but I did have to spend quite a bit of time figuring out how PTT was signaled from the intercom to the radio. (reference single-line PTT pages here -todo).
To add / write:
- Interface cables and pinouts
- Pointers to single line PTT reference pages
- Pointer to autocom interface circuit built by others
- Pointer to manhattan construction technique
- Photos of build
- T2-301 installation notes
- Photos of installation (ugly!) and the antenna mounting — not so good yet.
Hi Alan. Looks like its my lucky day – my Starcom1 Digital just arrived and I sat down in my shack with a cup of coffee to start working out how to hook it up to the FTM10R on my F650GS Dakar. I googled “starcom1 digital schematic” and got your page as one of the first few links! Just wondering whether you have made any further progress with the project and whether there are any updated notes or schematics you could share? Thanks and 73!
I have almost put the project on hold; however I had it working reasonably well. The schematic works fine, however you do need to tweak the audio quality with the potentiometers. The idea being to match the impedance and attenuate appropriately (R1, R3 the former and R2,R4 the latter). It helps if you have an assistant to monitor voice quality of your transmissions. I ended up with a ground loop somewhere in my installation I think, as I have quite a bit of engine noise on transmit. I have not had the time to track it all down; there is an excellent article on ground loops and RFI that I highly recommend as reading prior to doing the installation written by Jim Brown. As far as I can tell, his paper is the most referenced document on the topic. I will update the original article with some photos of my build.
Thanks for the extra info Alan.