Boost your CB and HF communications with the 300W CB Radio Amplifier BJ-300. Designed for the 3‑30 MHz band, this high‑performance power booster delivers crystal‑clear signal strength, extended range, and reliable operation for both casual hobbyists and professional operators.
Key Highlights
- Powerful 300 W output for superior transmission reach
- Wide frequency coverage: 3 MHz – 30 MHz (CB, HF, Marine, and Amateur bands)
- Low‑noise design ensures clean audio without distortion
- Built‑in protection: over‑heat, over‑current, and SWR monitoring
- Compact, rugged metal chassis with heat‑sink for durable outdoor use
- Easy installation with standard 12 V DC power input and universal connectors
Why Choose the BJ‑300 Power Booster?
The BJ‑300 amplifies your signal without sacrificing clarity, giving you a stronger, more reliable connection on busy channels. Whether you’re cruising the highways, sailing offshore, or operating a remote base station, this amplifier maximizes your antenna’s potential and keeps you heard.
Technical Specifications
- Output Power: 300 W (continuous)
- Frequency Range: 3 MHz – 30 MHz
- Input Voltage: 12 V DC (7 A max)
- Gain Control: 0 – 30 dB adjustable
- SWR Protection: Auto‑shutdown at 3:1 SWR
- Operating Temperature: -20 °C – +55 °C
- Dimensions: 210 mm × 150 mm × 80 mm
- Weight: 2.2 kg
Installation & Compatibility
The BJ‑300 features standard PL‑259 and SO‑239 connectors, making it compatible with most CB radios, HF transceivers, and antenna systems. A simple wiring diagram and quick‑start guide are included, so you can have the amplifier up and running in minutes.
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Price: Original price was: $ 226.48.$ 110.98Current price is: $ 110.98.

