I have 2 Motorola GM-300 UHF mobile sets extra and I would like to make it as private homebase repeater. I'm looking for simple controller interface schematic diagram for these RIGs. Hope to get the info for this, thank you very much.
Please keep in mind you will need to dramatically reduce the power output on the GM300 transmitter. That radio was designed with land mobile style transmissions - a few seconds at a time. It will overheat quickly transmitting for longer than a minute or so and will need a LOT of extra cooling in addition to reduced power.
Good luck, I fear though you will be disappointed using the GM300s long term.
Thank you for your infomation. I will try on this.
How about if I also want to transmit on VHF 2M, I have 2 sets of Yaesu FT-1500M as well, do you have any idea about this repeater interface with timer delay? I look forward to receive your reply soon, best regards.