Philipp Wagner (DN9APW)
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Built-in DX Cluster Server
🇬🇧 You are reading the English version | 🇩🇪 Deutsche Version
From version 1.23, KST4Contest includes a built-in DX cluster server. It sends spots directly to the logging software whenever a direction warning is triggered.
(Idea by OM0AAO, Viliam Petrik – thank you!)
What is the Built-in DX Cluster Server For?
When KST4Contest detects that a station is requesting a sked from your direction and a QRG is known, it automatically generates a DX cluster spot and feeds it directly to the logging software's cluster client / band map.
The logging software then displays the spot in the band map. Clicking the spot sets the transceiver's frequency and mode directly – without any manual typing.
Setup
In KST4Contest
In Preferences → DX Cluster Server Settings:
- Enter the port of the internal server (e.g. 7300 or 8000 – must match the logging software).
- Enter a spotter callsign – this must be a different callsign than your contest callsign!
- Reason: Logging programs filter spots from your own callsign as "already worked". If the spotter uses the same callsign, the spots will not be displayed.
- Enter the assumed MHz: For frequency references like ".205" in the chat, KST4Contest needs to decide whether 144.205, 432.205 or 1296.205 is meant. For single-band contests, simply enter the corresponding band centre. Full frequency references like "144.205" or "1296.338" in the chat are always correctly identified.
In UCXLog
- Configure a DX cluster server connection:
- Host:
127.0.0.1(or IP of the KST4Contest computer) - Port: As configured in KST4Contest
- Password: can be left empty
- Host:
- Use the "Send a test message to your log" button to test the connection.
In N1MM+
Similar settings:
- Host:
127.0.0.1(or IP of the KST4Contest computer) - Port: As configured in KST4Contest
How It Works
A spot is generated when both conditions are met:
- A direction warning has been triggered (station is making a sked in your direction).
- The station's QRG is known (read from the chat or manually entered).
The generated spot contains:
- Station's callsign
- Frequency
- Spot time
The logging software can then display the spot in the band map and tune the TRX to that frequency with a mouse click.
Multi-Computer Setup
If KST4Contest runs on a separate computer (not the logging computer):
- Host in the logging software: IP of the KST4Contest computer (not
127.0.0.1) - Same configuration as for the QSO UDP broadcast packets (see Log Synchronisation)
Tested Logging Software
- UCXLog ✓
- N1MM+ ✓
Further test reports are welcome – please send by email to DO5AMF.