Mhz Power Amplifier

HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933

HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933
HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933
HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933
HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933

HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933    HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933

PA10-300W power amplifier 4-6W in, 300W out 1.8-54 MHz. This device is made for use with low power SDR radios , like ANAN-10, FLEX-1500 or QRP HF transceivers. With 3 to 4 W input power from SDR it runs solid 300W to your antenna. Max power is limited by 450W by output transmission lines transformer voltage ratio. The amplifier's output is not filtered by LPF , so do not forget to add it.

This amplifier may be used with QRP transceivers like FT-817 or IC-703 (with automatic band decoder) also. Active elements are matched pair of SD2933 MOSFET transistors (see schematic) in AB-class.

2-tone measured IMD3 is -40 dBc. Measured by KC901H network analyser suppression of second and third harmonics (amplifier with diplexer) is: 10 meters 2nd -52 dB 3rd -55 dB 20 meters 2nd -54 dB 3rd -47 dB 80 meters 2nd -53 dB 3rd -51 dB. Power supply required is 48V 12A. Size 165 x 60 x 30(h) mm. Drain voltage +48...53 VDC.

Drain current (at 300W) 12A. The item "HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933" is in sale since Monday, December 30, 2019. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "y_r3kbo" and is located in Voronezh.

This item can be shipped worldwide.

  • Brand: Unbranded/Generic
  • Model: PA300
  • Country/Region of Manufacture: Russian Federation
  • MPN: Does Not Apply
  • Band: HF
  • Max. Output Power: 450W
  • Amplifier Class: AB1
  • Frequency Band(s): HF
  • Type: Power Amplifier
  • Supported Modes: CW


HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933    HF power amplifier 300-400W 1.8-30 MHz with transistors SD2933