Welcome to the DMR Group of the Bay Area Communications Society, a technical group of experimenters and builders of amateur radio systems, including Digital Mobile Radio, located in the San Francisco Bay Area. We use our 5 Baycom UHF DMR repeaters in a Brandmeister cluster, on ‘Baycom Talk Group 97150’ Time Slot 2, mainly for communication while building our other projects, including complex remote HF stations (K6MTU), 8 mountain top IP/VoIP distribution networks, Video IP systems, Gigabit microwave VPN and L2 Pseudowire networks, a large MPLS network, the NCDX Beacon, FlightRadar24 ADS-B receivers, MarineTraffic AIS receivers, NASA DeepSky Fireball Network Meteor Cameras, Redwood Seismic Network seismographs, Air Quality monitors on Mt Umunhum, McQueen Ridge and Empire Grade, as well as a professional Weather station to NOAA specs on Mt Umunhum. Future air quality monitors installations are planned for Mt Allison, Mt Toro and Mt Vaca.
We are open to all, yet we do have a few (gently) suggested tips to make your (and our) lives easier. We’d appreciate your cooperation.
We monitor our repeaters with RTL-SDRs, Cubic SDR, Gqrx, DSD+FastTrack for the DMR RF data side of things and Wireshark, TCPdump, Pingplotter, some MOS Score (ITU P.861) VoIP quality testing s/w for the network side, along with the usual gaggle of network tools recommended by our friends at SLAC. We also monitor, graph and alarm Network trends and events using Raspi3b+ based Network Management systems employing LibreNMS, Nagios, pnp4nagios, smokeping, routers2.cgi, NagiosQL, MRTG.We use the tools to decode traffic, including Group calls, Private calls, LOCN-LRRP-APRS, SMS, data only frames, IP Site Connect data and beacons, but also radios which are misbehaving, in order to help folks out, not to be a pain ! You’d be surprised how easy it is to misconfigure a DMR radio and cause group problems for everyone. Ever been talking to someone and they just “go away” ? Ever try to get on a TS and you can’t, but there’s no activity you can see or hear (and it drives you crazy) ? We can help, give us a shout, we’re glad to help.
The Baycom DMR System consists of 4 Motorola UHF XPR-8400 ver R02.40.20 firmware repeaters linked to the USA-West Brandmeister server 3103 and are located around the San Francisco Bay Area and Santa Cruz California USA, they include:
WA6YCZ 442.5375 Mhz+ CC1 above San Jose, elevation 3509 ft, 37.160999 N -121.910040 W (decimal DD.mmssss for Google Earth)
K6OTR 441.85 MHz+ CC1 above Palo Alto, Monte Bello Ridge, elevation 2812 ft, 37.320348 N -122.142594 W
Mt San Bruno
N6AMG 440.500 MHz+ CC1 above SFO Airport, elevation 1319 ft, 37.687439 N -122.435547 W
WA6KPX 443.400 MHz+ CC1 above Milpitas East Bay, elevation 2657 ft, 37.5000 N -121.837001 W
Bonny Doon (Destroyed by the Aug 2020 by Lightning Fire)
WB6ECE 440.5875 MHz+ CC2 Northwest of Santa Cruz, elevation 1476 ft, 37.100254 N -122.141869 W
Baycom System Static Talk Groups
TS 1 – Common to all Machines
TS – 1 Unique to Geographic region machines
WA6YCZ – 31064 Santa Clara County by request
K6OTR – 91 Worldwide net from 0830 PST-1100 PST hrs every Sat
N6AMG – 31062 Mountain West
TS 2 – Common to all Machines
TG 97150 – Baycom
TG 31062 – Mountain West
TG 31068 – Norcal to TS 2 per request of several NorCal users.