gwardlow

AD4GC, you used a few screenshots to illustrate the pin placement for the ID-O-Matic IV and interface cables on the CDM1250 radios being used in tandem to make a homebrew repeater. I'm attempting the same thing out here at my home and hope you might take the time to Elmer me through this. Thanks in advance. I have all the parts and pieces however stringing them together in the right sequence may be a challenge I believe I can work through. The (correct) radio programming is the problem I feel is most daunting. For instance, the pin settings in the radio to match the rib configuration. Unsure how to set this - IF I need to make any mods. The frequency programming for each radio leaves me uncertain. 1. Two radios, one Tx & one Rx. Does the Rx radio get both Rx & Tx boxes filled with the Rx frequency? 2. Does the Tx radio get both Rx & Tx boxes filled with the Tx frequency? 3. Are the radios programmed in 'talk-around' or simplex? 4. Ae there audio settings to be included? 5. Do I need to make modification to the pin settings? The pin settings below are NOT clear to me. Any, any help or guidance you care to provide is appreciated. My email is; gregg@wardlow.org Gregg N4RGW / WQLY786 ID-O-MATIC IV 4 built and tested (INCLUDES your GMRS callsign programmed) With two 16 pin rear accessory connectors wired to the controller (one for TX radio, one for RX radio) for plug and play to make an instant repeater from any two compatible Motorola radios (Any Motorola radios with 16 or 20 pin rear accy connector, programmed for pin-8 COR active low (or high changed in programming). For CDM radios, use center 16 pins. Compatible with GM300, M10, M120, Maxtrac (WITH 16 pin rear connector), CDM750, CDM1250, CDM1550, M1225, CM200, SM50, SM120 and any Motorola radios with 16 or 20 pin rear accy connectors, programmed for pin-8 COR active low (or high changed in programming) WITH VOICE AUDIO IDer board wired to and tested with above. With enclosure Motorola radios using 16 or 20 pin rear accy connector pins TX radio pins: Pin 2 Mic Hi (audio in) (WHITE to pin 11 IDOM4) Pin 3 PTT active low (GREEN to pin 3 IDOM4) Pin 7 Ground (BLACK to pin 1 or 12 IDOM4) RX radio pins: Pin 7 Ground (BLACK to pin 1 or 12 IDOM4) Pin 8 COR (active low is default for IDOM4) (BLUE to pin 7 IDOM4) Pin 11 discriminator audio out (YELLOW to pin 8 IDOM4) Pin 13 +12 vdc (this is where IDOM4 gets its power) (RED to pin 2 IDOM4)