Changes & additions to W5OLF’s QRP WSPR kit

Almost a year and a half ago I ordered, built and wrote about a new kit – a stand-alond WSPR transmitter from Jay Wilson W5OLF. You can read it here.

Jay has just announced three big changes to this kit:

  • It now has built-in timing for transmissions
  • The PA can be turned off without losing timing sync
  • A 20m version is available

Jay also has a new website describing the kit – so new it’s not fully written yet but enough is there to adequately describe the new version.

Hopefully there will be a manual available for downloading soon. I’d like to know more about the timing selections available.

Check it out here:



  3 comments for “Changes & additions to W5OLF’s QRP WSPR kit

  1. December 6, 2012 at 8:53 pm

    In your previous article you wrote timing are not tight. They do are tight. While for local receiving you can have many seconds delay because the software will have all the symbols right and can reconstruct the sequence. For “weak signals”, it needs a precise timing to allow a high error rate and still be able to decode the sequence.
    W5OLF has a nice kit design. I am also offering a kit for upgrade G0UPL/G0XAR for WSPR transmission, and I will soon offer a WSPR transmitter using a DDS for more flexibility…

    • December 7, 2012 at 7:04 am

      That’s good to hear, Yan – I’ll be looking forward to more details of your new kit.

  2. December 8, 2012 at 2:00 pm

    Interesting John, still have to build the original one though. 73, Bas

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