50 Watt HF/6m Power Amplifier for Yaesu FT-817, Icom IC-703/705, Elecraft KX3, automatic band switching


50W HF/6M Power Amplifier with automatic band switching

SKU: 50W HF + 50MHz PA-1 - auto Categories: ,


This is custom designed HF/6M solid state ham radio amplifier with automatically switched LPF onboard, 4 x RD16HHF1 based, intended for field or mobile operations or as driver for LDMOS amplifier. This amplifier produced from high quality ORIGINAL parts, such as Mitsubishi transistors and AMIDON cores. PA PCB mounted on metal heatsink for good heat dissipation.  PA has 3 dB flatness of frequency response and PA can operate 24x7x365 in any digital modes without extra cooling.


  • Nominal power supply – 13.5v
  • Maximum current is – 12A
  • Idle current is – 0.8A (in TX mode without RF)
  • Input frequency – 1.8, 3.5, 7, 10, 14, 18, 24, 28, 50 MHz
  • Input and output impedance – 50 Ohm
  • Input SWR – <1.5 for all bands
  • Nominal input power – 1.5-3W (31.7-34.7dBm), depends on band
  • Maximum input power – 5W (37dBm)
  • Nominal output power – 50W (47dBm)
  • Maximum output power – 65W (48.5dBm)
  • Measured IMD3 performance is -32dB for nominal power
  • External PTT signal – GND active,  RCA female connector, <1 mA sink current, no relay required
  • Band switching – automatic, RF sense
  • Case size – 187x120x80 mm
  • Weight – 1.2 kg

eHam reviews see HERE

Also please take a look to my 100W cased amplifier



Additional information

Weight 1.5 kg



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50W HF/6M automatic amplifier


schematic diagram