LDMOS 600W HF/6m AMPLIFIER BOARD 6M MRF300AN MRF300BN SSB DIY Power Amplifier US

600W HF Linear Amplifier Board – DIY Kit for Amateur Radio (1.8–30MHz)

This shortwave power amplifier board is designed for experienced ham radio operators. It requires strong soldering skills and RF knowledge for proper installation.

⚠️ Important:

  • Transistors (MRF300AN / MRF300BN) and heat sink are NOT included – you must supply your own.

  • No technical support will be provided for this DIY kit.

Key Specifications

 
ParameterValue
Frequency Range1.8 – 30 MHz
Input Power1 – 5W
Max Output Power600W
Supply VoltageDC 12V + DC 53V
Operating Current12V: 1A / 53V: 15A
Gate Bias Voltage2.7V
Quiescent Current300mA + 300mA
Weight276g
PCB Dimensions (L×W×H)138 × 88 × 40 mm

Compatible Transistors (Buy Separately)

  • MRF300AN (N-Channel)

  • MRF300BN (P-Channel)

Please refer to the official MRF300A series datasheet for proper biasing and thermal management.

Features

  • Covers all HF bands (1.8–30MHz)

  • Linear class‑AB design suitable for SSB, CW, and digital modes

  • Separate 12V and 53V power inputs for low‑voltage control and high‑power stage

  • Compact size – fits into small enclosures

Package Includes

  • 1 x 600W HF Amplifier PCB Board

  • (Transistors, heat sink, and other components are NOT included)

Important Notes

  • For experienced users only – this is an advanced DIY project.

  • Proper heatsinking and cooling are mandatory for 600W operation.

  • Incorrect installation or overdriving may damage the board and transistors.

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  • -Import duties and taxes is not included in shipping fee or item price.

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