> "va3rzs" <va3r...@...> wrote: > Looking to put the 220 repeater on the controller > has any one done this ? > Thanks for any and all help > Rick
I've seen external repeater controller connections made on/to Icom Repeaters in a number of different ways... and of course it depends what the model number and era the repeater was made. The early Icom Amateur Repeaters are defined by me to be the ones with small on board uP controllers, which require Eprom programming for the IDer. And I've seen two different versions of the "early Eprom Icom Repeater Controller boards". *The processor chip defines the Eprom size and ID programming location. I can, do and have reprogramed the Eprom ID chip information to/for anyone willing to pay the return postage. In some models/versions the early repeaters are crystal frequency based and the offset in the case of the 1290MHz units was not changed without a modification (which I was told is/was available). Later Icom Repeaters had synthesized frequency and ID setup (programming) via dip switches and a few other hoops. Interface on the late Icom Repeaters was easier to some degree as there was an interface jack built right into/onto the back of the cabinet. I've seen two external controller interface methods applied to the Icom Repeaters. The first was to completely disable the internal (early) uP Board COR/COS logic and make most of the connections to the audio RF and cos there/nearby. Depending on who's mod I've seen... sometimes the original tech would install interface transistors/fets at logic locations coming right off what I consider critical part locations. These buffer/inverter devices (transistors/fets) were used to isolate the direct uP chip output logic line for CTCSS and or COS. Just depended on what controller was in the repeater and who was doing the mod. I haven't seen a super clean mod for the older repeaters but everyone I've been exposed to (so far) didn't break anything (cause a failure). I looked around the RB site for this subject information and there is surprisingly little around (yet). I'll continue to look around and I do still have one of those modified Icom (early) repeaters on the shelf. The $%^&#*@ synthesizers crapped out on two repeaters I have here and of course you can't get parts to fix them. back after this commercial message... cheers, skipp
