Ham radio communication techniques and concepts: narrowband and ultra-wideband modulation; skywave NVIS and extended groundwave propagation; designs for small disadvantaged antennas; designs for efficient switching amplifiers; and other exotic radio phenomena

New WSPR-AXE-CW Beacon


  • New WSPR-AXE-CW Standalone
  • Very simple WSPR operation
  • No programming required
  • Easy kit build or assembled/tested
  • Available for 30M, 20M, 10M
  • Unique random shift modulation
  • Output power of 1W on 30M, 20M
  • Output power of 0.5W on 10M
  • Low current of ~2mA to run clock
  • Efficient class-E power amplifier
  • Click here for construction manual

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