Recommended Baofeng radio settings for packet radio operations. These settings disable features that can interfere with data transmissions.
| Menu | Setting | Value |
|---|---|---|
| 0 | SQL | 0 (off) |
| 2 | TXP | High |
| 3 | SAVE | Off |
| 4 | VOX | Off |
| 5 | WN | Wide |
| 7 | TDR | Off |
| 10 | R-DCS | Off |
| 11 | R-CTCS | Off |
| 12 | T-DCS | Off |
| 13 | T-CTCS | Off |
| 14 | VOICE | Off |
| 25 | SFT-D | Off |
| 26 | OFFSET | 00.000 |
| 35 | STE | Off |
| 36 | RP-STE | Off |
| 37 | RPT-RL | Off |
| 39 | ROGER | Off |
Key points:
- SQL 0: Squelch fully open to not miss any incoming packets
- Wide bandwidth: Required for proper packet audio
- VOX off: Use PTT control from your TNC/soundcard interface
- All tones off: CTCSS/DCS tones interfere with packet data
- ROGER off: Roger beep would corrupt packet transmissions
- STE off: Squelch tail elimination can clip packet audio
Connecting to a TNC
The Baofeng uses a 2.5mm/3.5mm dual-connector (K1 type). The wiring to a TNC is as follows:
| Wire color | Pin | Connect to |
|---|---|---|
| White | PTT | TNC PTT pin (via 2.2kΩ resistor) |
| Black | GND | TNC Ground |
| Red | Microphone | TNC audio OUT |
| Transparent | Speaker | TNC audio IN |
The 2.2kΩ resistor on the PTT line is important — it protects the radio’s PTT circuit from being driven directly by the TNC.
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