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The PK-4 from Harbor Press USA is a Morse code iambic keyer which offers:

  • pot or paddle speed control, 5 to 39 WPM
  • callsignmemory and parameters stored in EEProm
  • one 57, one 52 character memories and a callsign memory 
  • OR optionally one 57, two 26 and one 10 character memories 
  • mode A or B Iambic keying 
  • Dash and/or Dot memory can be switched off
  • beacon mode, variable delay, up to 60 seconds During beacon delay, Key down or key up possible
  • one touch CQ using callsign memory embedded 
  • manual pause of memory play 
  • machine pin socket for keyer chip included with kit
  •  speed readout - sends code speed via the sidetone 
  • optional autospace, 
  • paddle reverse 
  • and many other features 
  • low standby power (about 7 uA at 5 V, with regulator) 
  • low active power (1.5 ma max. at 5 V, with regulator) 
  • small size PCB (25x30mm)


Kit includes PCB and all parts. 

Seperate Add on kit includes envelope, Plug ins, Switches to build a stand allone keyer electronic.

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