Download and unzip this file to a folder of your choice.

What you might want to know about SlowJT9_Monitor

About SlowJT9_Monitor

SlowJT9_Monitor is a small application that receives and displays the UDP messages broadcasted by SlowJT9 (including audio alert). This application is meant to be installed on another computer. If you install it on the same computer as SlowJT9 ensure that the applications are not using the same audio output!

How to use

After launching SlowJT9_Monitor this will appear:



  1. Status line, this can be:
  2. Message screen, received messages will be shown here. The same background colour scheme as for SlowJT9 is used.
  3. Select the UDP port to be used. This must be the same port number as set in SlowJT9 (default 2239). Ensure not to use a port that is already occupied by another application, in particular port 2237, the default port used by WSJT-X.
  4. Sound interval: Interval (seconds) in which the alert audio file is played.
  5. Select the audio file (wav) format) to be played as alert. If left empty, or if this file is missing, the default Windows "you have mail" sound will be played.
  6. Date and time display.
  7. Click here to select the Windows default "you have mail" sound as audio alert.
  8. Check this box to enable the audio alert (uncheck to disable). After an audio alert is triggered a speaker symbol (red on yellow background) will be displayed. Click on the speaker symbol to stop the audio alert.
  9. Set the duration of the audio alert.
  10. Click here to start (or stop) the UDP broadcast reception.
  11. If this box is checked only alert messages (as selected in SlowJT9) will be displayed. If unchecked all messages will be displayed.
  12. Minimize SlowJT9_Monitor.
  13. Close SlowJT9_Monitor.



Questions, suggestions, bug reports

Questions, suggestions and bug reports can be addressed to

For bug reports please


73, Rik   ON7YD - OR7T