Our Best-Selling SRPT-03 – The Heart of Every FieldLink
Ultra-Compact Powerhouse
The SRPT-03 is our flagship best-seller for a reason—it's the incredibly compact brain that powers all our FieldLink systems. This plug-and-play simplex repeater records up to 45 seconds and rebroadcasts on the same or different frequency, instantly extending your range without a duplexer or second radio. Perfect for emergencies, events, or off-grid adventures.
Pocket-Sized Performance
At just 70×48×16 mm and powered by a built-in 1000 mAh battery (or any USB-C solar panel), the SRPT-03 delivers days of operation in the smallest package possible. Pair it with your BaoFeng UV-5R for a full portable repeater system that's lighter and more affordable than traditional setups—yet delivers up to 25 miles line-of-sight range.
Smart Features Built In
DTMF remote control, periodic Morse code station ID, fox hunt beacon mode—all in one tiny board. Enable/disable the repeater remotely, stay legal with automatic ID, or use it as a beacon in emergencies. It's the most feature-packed simplex repeater on the market, trusted by thousands of GMRS and Ham operators.
Handcrafted American Quality
Every SRPT-03 is proudly handcrafted in New Hampshire, USA with premium components and obsessive attention to detail. When you buy from Red's Engineering, you're supporting American jobs and getting rock-solid reliability that outlasts cheap imports. This is the repeater that started it all—join the thousands who trust it in the field.
Why the SRPT-03 is Our #1 Best-Seller
- Affordable Entry Point: Full repeater capability starting at just $69.95
- Battery + Solar Ready: Built-in 1000 mAh Li-Ion + USB-C for endless off-grid power
- 45-Second Store & Forward: Crystal-clear message repeat on same/different freq
- Smart Extras: DTMF control, Morse ID, fox hunt mode
- Ultra Portable: Tiny size fits in your pocket
- American Made: Handbuilt in New Hampshire for superior quality
Real-World Reviews & Tests from the Community
Specifications
| Feature | Details |
|---|---|
| Repeater Model | SRPT-03 Simplex Repeater |
| Compatibility | BaoFeng UV-5R, UV-5G, UV-S9 Plus, and similar |
| Record Time | 45 seconds |
| Power Source | 1000 mAh Li-Ion battery or USB-C (solar compatible) |
| Dimensions | 70 × 48 × 16 mm |
| Weight | Lightweight board (full system weight depends on radio) |
| Features | DTMF control, Morse ID, Fox Hunt mode |
| Range | Up to 25 miles (line-of-sight, terrain dependent) |
| Origin | Handcrafted in New Hampshire, USA |
Join thousands of happy users. Grab the SRPT-03 today—the best-selling foundation of portable GMRS repeaters.
Get Yours Now – $69.95