PickGuideTIDRADIO TD-638 Review: 10W IP67 Ham & GMRS Radio with GPS, APRS & Bluetooth at $80
The TIDRADIO TD-638 is the radio for operators who want everything in one package: 10 watts of output power, IP67 waterproofing for full submersion resistance, built-in GPS with APRS beacon support, and Bluetooth connectivity for smartphone programming — all under $80.
The TIDRADIO TD-638 is a 10-watt dual-band handheld radio covering UHF, VHF, and GMRS frequencies — built to handle serious outdoor conditions. The IP67 rating means it can be submerged in up to 1 meter of water for 30 minutes, making it genuinely weatherproof rather than splash-resistant. The built-in GPS module feeds into a functional APRS system that allows position tracking and messaging through the APRS network — a feature typically reserved for more expensive amateur radios. Bluetooth enables wireless connection to external microphones, speakers, and the TIDRADIO companion app for over-the-air programming without a cable. The large color display shows APRS data, GPS coordinates, bearing, and channel information clearly. At $79.99, it positions itself as a premium feature set at a mid-range price, landing well above entry-level walkie-talkies but significantly below comparable GPS/APRS radios from major brands.
Pros
- IP67 waterproof — withstands full submersion, not just rain or splashes
- Built-in GPS with APRS beacon enables real-time position tracking over ham radio networks
- 10W output power delivers strong range in open terrain and through obstacles
- Bluetooth programming via app eliminates the need for a programming cable
- Covers UHF, VHF, and GMRS in a single radio
- Color display shows GPS, APRS, and channel data in a readable layout
Cons
- APRS and GPS features require amateur radio license to use on ham frequencies
- Bluetooth range for external mic/speaker accessories may vary by environment
- At 10W with GPS active, battery life is shorter than low-power radios
- GMRS frequencies require a separate GMRS license in the US
Who It's For
Good For
- Licensed ham radio operators who want GPS and APRS in a compact, rugged package
- Hikers, hunters, and search-and-rescue volunteers who need real-time position tracking
- GMRS users who want a waterproof, high-power option for family or group communication
- Enthusiasts looking for a feature-rich radio at under $100
Skip If
- You're a beginner with no ham or GMRS license — many features require one
- You need a multi-day battery life radio for extended wilderness use
- You want a simple walkie-talkie without GPS or APRS complexity
How It Compares: TIDRADIO TD-638 – 10W IP67 Ham & GMRS Radio with GPS and APRS vs TIDRADIO TD-H8 Ham GMRS Radio
| Spec | TIDRADIO TD-638 – 10W IP67 Ham & GMRS Radio with GPS and APRS | TIDRADIO TD-H8 Ham GMRS Radio |
|---|---|---|
| Price | $79.99 | $59.99 |
| Output power | 10W | 10W |
| GPS | Built-in | No |
| APRS | Yes | No |
| Waterproofing | IP67 | IP54 (est.) |
| Bluetooth | Yes | Yes |
The TD-638 adds GPS, APRS, and stronger waterproofing over the TD-H8 for $20 more — worth it for anyone who needs position tracking in the field.
See TIDRADIO TD-H8 Ham GMRS Radio →
Verified Ratings
Key Specs
| Output power | 10W |
| Waterproofing | IP67 (1m / 30 min submersion) |
| GPS | Built-in |
| APRS | Supported |
| Bluetooth | Supported (programming + accessories) |
| Frequency bands | UHF / VHF / GMRS |
| Display | Color LCD |
| Programming | Bluetooth app or keypad |
In The Box
- TD-638 handheld radio
- Rechargeable battery pack
- Charging cradle / cable
- Antenna
- Belt clip
- User manual
Frequently Asked Questions
Do I need a license to use the TD-638?
For ham (amateur) radio frequencies, a Technician class license or higher is required in the US. For GMRS, a separate FCC GMRS license is required. The radio can be used for receive-only scanning without a license.
How does APRS work on the TD-638?
APRS (Automatic Packet Reporting System) uses the built-in GPS to periodically transmit your position as a data packet over ham radio frequencies. Other APRS-capable stations and internet gateways can receive and map your location.
Can I program the TD-638 without a computer cable?
Yes. Bluetooth connects to the TIDRADIO app for wireless channel programming and configuration directly from your smartphone.
Is IP67 sufficient for rain and outdoor use?
Yes. IP67 means full submersion protection up to 1 meter for 30 minutes — it handles rain, splashes, and accidental drops in puddles or streams without issue.
What is the range of the TD-638?
Actual range varies by terrain, antenna, and obstacles. At 10W in open terrain, ranges of 10–25 miles are achievable on VHF/UHF. In dense urban environments or heavy tree cover, range is significantly shorter.
Verdict
The TIDRADIO TD-638 delivers a feature combination that's genuinely hard to find under $80: IP67 waterproofing, GPS, APRS, Bluetooth programming, and 10W output. It's best suited for licensed operators who want a rugged, full-featured radio for outdoor use without paying flagship brand prices. For that audience, it's an exceptional value.