This document is a user manual for the Kenwood TM-281A 144MHz FM radio transceiver. It describes the features of the transceiver, such as easy control menu, 200 programmable memory channels, continuous tone coded squelch system, large LCD display, etc. It also reminds users to pay attention to safety precautions when using the transceiver.
The Kenwood TM-281A is a 144MHz FM transceiver designed for amateur radio enthusiasts. This manual guides users through initial setup, including vehicle or base station installation, power connection, and antenna attachment. It explains how to operate the front panel controls, use the menu system for programming frequencies and features like CTCSS/DCS, and utilize scanning functions. This manual is written in Chinese.
| Frequency Range (TX/RX) | 144~148MHz |
|---|---|
| Mode | F3E (FM) |
| Antenna Impedance | 50Ω |
| Operating Temperature | -20℃~+60℃ |
| Power Supply | 13.8V DC ±15％（ 11.7∼15.8V） |
| Max Transmit Current | 8A or less |
| Receive Current (2W output) | 1.0A or less |
| Frequency Stability | ±2.5ppm |
| Dimensions (WxHxD) | 160×43×126mm |
| Weight | Approx. 1.13kg |
| Output Power | 25W |
| Microphone Impedance | 600Ω |
The transceiver uses a 13.8V DC power supply.
No, do not use a 24V battery as it may damage the unit.
The frequency stability is within ±2.5ppm between -20°C and +60°C.