The BMK Beacon is a compact, configurable radio transmitter beacon compatible with licence-free radio bands including PMR (UK/EU), FRS (US/Canada), and UHF-CB (Australia/NZ/Malaysia). Advanced users may configure the device to operate outside standard bands, but please ensure local regulations are followed.
📄 Download Manual
Includes setup instructions, configuration tables, and frequency references.
🔊 Suggested Receiver:
- Baofeng UV-5R – Available on Amazon UK
🔋 Compatible Battery & Chargers:
📦 Package Contents:
- BMK Beacon
- 100mm Micro JST 1.25mm power cable
🔈 Tone Options
- 3-Tones (Recommended): Emits three distinct tones (100ms each) at different power levels (+14dBm, +2dBm, -10dBm) to help estimate range based on tone count.
- Chirp: Emits 50ms single-tone beeps for a retro beacon sound. Lower current draw but may not activate squelch. Use with "MON" or squelch set to zero.
📡 Frequency Options
- PMR446 (UK, EU, Turkey): Licence-free band from 446.00625 MHz with 12.5kHz spacing. Channels are linear. Default: CH16 (446.19375MHz). Learn more.
- FRS (US, Canada): Licence-free band from 462.5500 MHz. Channels are not linear. Default: CH14 (FRS CH7) (462.7125MHz). Learn more.
- UHF-CB (Australia, NZ, Malaysia): From 476.625 MHz. Channels are complex. Default: CH15 (UHF-CB CH16) (476.800MHz). Learn more.
- Special: Custom frequency setup available. Requires technical knowledge and may not be suitable for single-unit orders.
⏱️ Interval Options
The signal interval is configurable between 1 to 16 seconds. Default is 4 seconds.
- 3-Tone: 1.8mA @ 4s, 0.5mA @ 16s
- Chirp: 0.5mA @ 4s
See the manual for configuration details.
⚙️ Features
| Working Frequency | 400–480MHz |
| Max Output Power | +14dBm |
| Range | >5km with Baofeng UV-5R+ |
| Input Voltage | 3–15V |
| Current (3-Tones) | 1.8mA @ 4s, 0.5mA @ 16s |
| Current (1-Tone) | 0.5mA @ 4s |
| Max Current | 36mA |
| Interval Range | 1–16 seconds (4s default) |
| Modulation | FM (narrow) |
| Channel Spacing | 12.5kHz |
| Channel Count | 64 (First 16 PMR channels are legal) |
| Dimensions | 16mm × 8mm × 5mm (with connector) |
| Weight | 0.54g (including antenna) |
🛠️ Troubleshooting
- LED not blinking: Replace the battery.
- No signal on receiver: Check beacon channel and ensure radio is in narrow FM mode with low or no squelch.