Amateur Radio Information
Calling All ROC Hams…
Quite a few ROC members are licensed amateur radio operators (“hams”). To make it easier for us to contact one another at ROC launches, we’ve decided to publish the following information.
- 146.535 MHz (2m band): Simplex
- 145.180 MHz (2m band): Repeater (-0.6 MHz/PL 123.0) local in Lucerne Valley
If you can only monitor one of these frequencies, make it the repeater, as that will give us the best chance of always being able to connect. After making contact on the repeater, if you are within range of the lake bed, you can switch to simplex operation to free up the repeater for other users.
Wide area coverage:
- 147.885 MHz (2m band): (-600 KHz/PL 151.4) Barstow Amateur Radio Club, linked to 147.180 MHz (+600 KHz, PL151.4) located East of Barstow and covering Lucerne Valley, the 18 up to Holcomb Valley, The 247 from Barstow to Johnson Valley, I40 and I15 North of Barstow, and much of the surrounding area.
- 147.330 MHz (2m band): (+600 KHz/PL 131.8 Hz) on Big Bear Mountain
Avionics Frequencies Used by ROC members
- 444.55 MHz (70 cm band): K6AHF Beeline GPS (-1 and -2 SSID’s)
- 449.000 MHz W6DPS-3, -4 Beeline GPS
- 444.915 MHz W6DPS Beacon
- 433.92 MHz A bunch of stuff by a bunch of people.
- N6RTD: Rick Dickinson, Crayon Rocketeer
- KJ6JMU: Michael Klett, Rocket Science Beginner
- AG6LD: Kenneth Brown, Itinerant Wanderer
- AA6TB: Bob Koepke, AIAA OC Rocketry
- WK6I: Jeff Stai, Occasional Wookie
- KI6KGE: Matt Campbell, Lakestake Rocketry
- KE6ECO: David Lichtman
- K6AHF: Allen Farrington, Beeline 70 cm GPS Only
- W6ZH: Rob Brigham
- W6DPS: David P Smith
- KC6UVM: George J. Becker, from Lancaster, CA
- KI8RK: Veronica Kirk, Amateur Extra
- KG6QBN: Suzanne Gregory, Amateur Technician
- KA6EYB: Sheila M. Blaise
- KK6FXD: Chris Mandala
- KK6FXF: Victor Mandala
- KF6GNE: Leslie Mayer, Amateur Technician
- KE6HGB: Scott Mayer, Amateur Technician
- KD0GG: Alex Liu
- AI6PG: Peter Grace, Amateur Extra
- KJ6ZVN: Oscar Rolan Amateur Technician
- AG6OV: Andy Tran, Amateur Extra
- KB6CGZ, Owen Phairis, General
- KM6DDP, Alex Jones, Technician, TeleMetrum/TeleBT 70 cm
- KM6KWF, Chris Wilson
- KK6ZSA, Stewart Gondo
- KD0FTK, Andrew Wimmer, Beeline 70 cm GPS Only
- K8JBL, Jenson Crawford
- KM6TCY, Mike Ostby, Beeline 70 cm GPS Only
- KE7SMH, James Healy
- KM6KTV: Greg Nylen, General
- (more to come…)
If you’d like your call sign listed here on the ROC web site, or want to suggest additional contact frequencies, please leave a comment message here, or Contact Us through the web form. Thanks!
Frequency Guidelines to Minimize Interference To and From Other Spectrum Users for Rocket Tracking
2 Meter Band
For APRS avoid 144.39 for rockets, unless time between beacons is at least 2 minutes. Use 145.01, 145.03, 145.05, 145.07, or 145.09. Most of the 2 meter band uses 15 KHz spacing, but these are digital (packet) frequencies still set aside, but with little use.
Beacons should be on an FM simplex frequency including 146.49, 146.505, 146.55, 146.58, 147.525, or 147.54.
You should AVOID:
- 146.52, National Calling Frequency
- 146.535 (used by ROC on the lakebed)
- 146.43 (ATV talk back)
- 146.565 (set aside for Foxhunts and frequently busy on weekends)
1-1/4 Meter Band
APRS rocket trackers should be on 223.46 or 223.48.
For beacons avoid frequencies below 222.13. Use Odd 10KHz buffer frequencies between the FM voice frequencies. California uses 20 KHz spacing with FM voice on even 10 KHz center frequencies.
70 Centimeter Band
APRS should be between 431 to 431.6 MHz or 448.94 to 449.98 MHz, 20KHz even spacing. The bandwidth from 434.00MHz to 440.00MHz should be avoided, as this is the input for a nearby Amateur Television repeater,
Beacons should be above 444.15, and use even 10KHz buffer frequencies.
33 Centimeter Band
APRS allocations on 33 Centimeters are on simplex frequencies, 927.500, 927,600, and 927.700.
Beacons must avoid 902.1 weak signal allocation! Should be between 903 and 905 MHz or 925 to 928 MHz.