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:
- 147.330 MHz (2m band): Repeater (+0.600 MHz/PL 131.8 Hz) on Big Bear Mountain
- 444.55 MHz (70 cm band): K6AHF Beeline GPS (-1 and -2 SSID’s)
- N6RTD: Rick Dickinson, ROC Board Member & 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
- KD0GG: Alex Liu
- AI6PG: Peter Grace, Amateur Extra
- KJ6ZVN: Oscar Rolan Amateur Technician
- AG6OV: Andy Tran, Amateur Extra
- (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!
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 other than 146.52, 146.535 (used by ROC on the lakebed), 146.43 (ATV talkback), or 146.565 (set aside for Foxhunts and frequently busy on weekends). Suggested frequencies are 146.49, 146.505, 146.55, 146.58, 147.525, or 147.54
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.
70 Centimeter Band
APRS should be between 431 to 431.6 MHz or 438.94 to 439.08 MHz, 20KHz even spacing.
Beacons should be above 444.15, and use “Odd 10KHz” buffer frequencies.
33 Centimeter Band
No APRS allocations on 33 Centimeters.
Beacons must avoid 902.1 weak signal allocation! Should be between 903 and 905 MHz or 925 to 928 MHz.