Why is RT-820W better than TD-638?
- Transmit power20 W vs 10 W2×
Why is TD-638 better than RT-820W?
TD-638 has no measurable advantages in this pair.
Specifications
Side by side
| Radio & range | ||
| Radio standards | VHF, UHF | VHF, UHF |
| Licence | Amateur licence | Amateur licence |
| Digital mode (DMR / dPMR) | Yes | — |
| Dual band (VHF + UHF) | Yes | Yes |
| Frequency ranges | 136–174 MHz, 400–470 MHz | 136–174 MHz, 220–259 MHz, 300–390 MHz, 400–590 MHz |
| Transmit power | 20 W | 10 W |
| Channels | 500 | — |
| CTCSS / DCS sub-tones | Yes | — |
| Power & battery | ||
| Battery capacity | — | 2,500 mAh |
| Design & durability | ||
| Protection rating | — | IP67 |
| Water protection (IPx) | — | IPx7 |
| Display | Monochrome display | Monochrome display |
| Features | ||
| VOX (hands-free) | Yes | — |
| Channel scan | — | Yes |
| Emergency / SOS alarm | Yes | — |
| Weather channels / alerts | — | Yes |
| FM radio | — | Yes |
| Voice encryption / scrambler | — | Yes |
| GPS | — | Yes |
| PC programmable | Yes | — |
| Connectivity | ||
| Bluetooth | — | Yes |
