Ham Radio KITS - TOP PAGE - Washington Island BOOKS

The PK-4 keyer kit - 10/28/2004

The PK-4 kit has been replaced by the PK4 SSR kit.

The PK-4 is fully pin compatible with the Norcal keyer. The PK-4 is pin compatible with the PK-3, PK-2 and PK-Basic (Tick and K8 chips, too) with the addition of a 10k ohm pullup resistor between pin 1 and 4 of the keyer chip socket. The PK-4 shares the pot speed control of the previous PK series and the Norcal keyer but it has a large number of new additional features. Here are a few highlights:

[PK-4 board picture]

  • pot or paddle speed control, 5 to 50 WPM
  • two 80 character memories plus an 80 character callsign memory
  • OR optionally two 80 and two 40 character memories
  • memories & settings retained without power (EEPROM)
  • Ultimatic or Iambic A or B keying modes
  • beacon mode, variable delay, up to 60 seconds
  • adjustable element weighting
  • variable sidetone frequency
  • low standby power (about 7 ua at 5 V, with regulator)
  • small size (1 by 1.5 inches)

  • View the manual , schematic and hookup diagram for more information on the kit.

    Downloadable files for the PK-4

    The Acrobat files of complex diagrams (like the PK-4 schematic) may not view well on your computer screen - suggestion: use the magnifier to zoom in for better detail or print out the file.

    pk4.pdf (53k) - PK-4 schematic

    pk4e.pdf (54k) - PK-4 manual in Acrobat format

    pk4hu.pdf (28k) - PK-4 Hookup diagram in Acrobat format

    pk4ts.htm (1k) - PK-4 Troubleshooting guide

    pk4menus.pdf (11k) - a PK-4 menu "cheat sheet" by Chuck Carpenter, W5USJ (thanks, Chuck)

    stalkin.pdf (16k) - Stalking the Wild Multipress! - an Acrobat file of a hardware method to solve the problem of pressing 2 or 3 switches at the same time.

    modeab.pdf (8k) - an Acrobat file explaning the differences between Iambic mode A and B

    ultimat.txt (4k) - a text file on the Ultimatic mode

    Ham Radio KITS - TOP PAGE - Washington Island BOOKS

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