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

(1 customer review)


50W HF/6M Power Amplifier

SKU: 50W HF + 50MHz PA Categories: ,


This is custom designed HF/6M solid state ham radio amplifier with 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 – 12A
  • Idle current – 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 perfomance –  -32dB for nominal power
  • External PTT signal – GND active,  RCA female connector, <1 mA sink current, no relay required
  • Band switching – manual, by pressing a button on front panel
  • Case size – 187x120x80 mm
  • Weight – 1.2 kg

eHam reviews see HERE

Also please take a look on my 100W cased amplifier

Cable connection kits for Hermes Lite2, Yaesu FT-817, Icom-705, Elecraft Kx3

Additional information

Weight 1.5 kg


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

  1. omar.metwally (verified owner)

    This amplifier is a beautiful beast. I’ve run it continuously for 48 hours connected to my CW transceiver and WSPR beacon and it has performed excellently so far, putting out 50 watts as expected. I would purchase a second one and highly recommend it to anyone looking for a solid 50 watt amplifier to complement a low-power transceiver such as the QRP Labs QMX that I’m using. The heat sinks do get hot to the touch, but a 5V DC fan is sufficient to cool it off. Strong work, 60 dBm, and thank you for delivering an awesome product.

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50W HF/6M amplifier schematic