About
Ribbit is an Open Source OFDM modem created by the Open Research Institute.
https://www.ribbitradio.org
Applications
Ribbit
Web-app (online only)
- ribbit.nz/app - Hosted in Christchurch, NZ
- badkangaroo.github.io - Same webapp hosted on GitHub
- WASM source code - for offline use or self-hosting
Rattlegram
Ribbit SMS app (works offline)
- Google Play Store for Android
- App Store for iPhone
- GitHub source code
Assempix & Shredpix
for sending/receiving pictures (works offline)
NZ Band Plan
Recommended calling channels for Ribbit/Rattlegram
Operators must comply with relevant radio communication rules and regulations.
CB & PRS public (GURL) bands
| Band | CH | MHz | Mode |
|---|---|---|---|
| PRS | 22[5] | 476.950 | NFM[1] |
| PRS | 23[5] | 476.975 | NFM[1] |
| CB | 8 | 27.055 | AM[2] |
| 11m | 24 | 27.245 | USB[2] |
General Amateur Bands
| Band | MHz | Mode |
|---|---|---|
| 80m | 3.555 | USB |
| 60m | 5.354 | USB[4] |
| 40m | 7.045 | USB |
| 7.195 | ||
| 30m | 10.140 | USB |
| 20m | 14.128 | USB |
| 17m | 18.112 | USB |
| 15m | 21.128 | USB |
| 12m | 24.976 | USB |
| 10m | 28.150 | USB |
| 2m | 144.210 | NFM |
| 70cm | 432.320 | NFM |
- Narrow (12.5kHz) FM emission only, 5W EIRP maximum.
- 11m HF CB channels are 5W EIRP maximum.
- 30 dBW max EIRP.
- NZART 60m sub-license applies: 11.8 dBW max EIRP.
- 22 and 23 are also noted as 'telemetry' channels in Australia. Be sure to not interfere with other users.
Please remember DX and radio ettiquete applies to digital modes. Check frequencies are not in use before calling CQ. Channels are recommendations only.
Schedule
Suggested activity times for QSOs and radio checks
The nets here are casual check-ins only with no formal script, just send out a PING, say hello and exchange a signal report to complete a Ribbit QSO!
| Band | Schedule |
|---|---|
| PRS | Mondays 8:00 PM |
| 11m | Sundays 4:00 PM |