After several attempts to get the link back on the air, we are moving closer to success. Extensive experimenting has shown that using a pair of DR2X repeaters for the system/link radios is not a preferred solution due to full-duplex looping issues on the link. As such, we are returning to the classic configuration of a DR2X 2m radio and a Maxtrac link radio. We had success keying this configuration on Saturday; however, we are still attempting to resolve the best way to pass audio between the machines.
On a related note, there is a possibility that we can add multi-mode digital voice to the Alamo Peak repeater with minimal cost:
MMDVM-Pi is a multi-mode digital modem which uses a Raspberry Pi computer and a simple $99 Pi-Hat to enable a radio (or repeater) to function as a gateway to DSTAR, DMR, System Fusion, NXDN, and P25 digital voice networks via the PiStar software interface. With an Internet uplink to the Alamo Peak site, the repeater can be used by digital radios on any of the above networks, bringing a tremendous capability to the Alamo Peak repeater. Additionally, initial research indicates that it may be possible to link all three system repeaters to take advantage of the capabilities of this digital modem. Stand by for updates as we investigate the possibility of integrating this modem into the Alamo Peak repeater.