Tri-Band Coverage
- 2m Band: 136–174 MHz
- 1.25m Band: 200–260 MHz
- 70cm Band: 400–520 MHz
RS-UV3A FM Transceiver
A versatile tri-band FM transceiver for 2m, 1.25m, and 70cm amateur radio bands
Overview
Section titled “Overview”The RS-UV3A is a compact FM transceiver board designed by Jim Veatch (WA2EUJ) at HobbyPCB. It provides a complete radio solution for voice, data, and beacon applications across three amateur radio bands.
Integrated USB
On-board FTDI USB-serial chip provides driverless connection to most operating systems. Power and control through a single USB cable.
Wide Voltage Range
Built-in buck-boost DC-DC converter accepts 3.5V to 16V input. Run from USB, 9V battery, or 12V wall adapter.
Arduino Ready
Direct headers for Arduino connection. Compatible with Raspberry Pi and other single-board computers.
Applications
Section titled “Applications”Voice Communications
Section titled “Voice Communications”- Single or multi-channel RX/TX transceiver
- Repeater and remote base operation
- Base station, mobile, or portable use
Data Communications
Section titled “Data Communications”- 1200 baud packet radio
- APRS with external TNC
- DTMF encode and decode
- CW (Morse code)
Specialized Uses
Section titled “Specialized Uses”- CW and audio beacons
- Signal measurement and test equipment
- Direction finding (pseudo-doppler DF)
- Repeater controller (using two boards)
- Satellite uplink/downlink
Quick Specs
Section titled “Quick Specs”| Parameter | Value |
|---|---|
| RX Sensitivity | < -120 dBm (12 dB SINAD) |
| Output Power | > 200 mW (23 dBm) |
| TX Spurious | < -50 dBc |
| DC Power | 3.5–16V |
| Current | 1.6W max |
| Board Size | 120 × 75 mm |
Rev A Features
Section titled “Rev A Features”The Rev A board adds several improvements over previous revisions:
- On-board USB-Serial: Driverless FTDI chip for plug-and-play operation
- Wide-range DC-DC: Buck-boost converter accepts 3.5V to 16V input
- Power Output: Optional power on DE-9 pin 6 for accessories
- LED Indicators: Power, TX, and user-definable status LED
Designed by Jim Veatch, WA2EUJ
HobbyPCB Wiki