How to Use the HQ Station Pre-fill Files in the IARU HF Contest

Send HQ callsign updates/corrections to Joe, OZ0J, contest@oz0j.dk

Latest addition (test call):   NU1AW/0 IARU

Last updated:   7 July 2026 02:26 UTC

Data files included in this Zip:

  iaru.txt - N1MM, SkookumLogger, UCXLog "Call History File" (text).
  iaru_n1mm_plus.txt - N1MM+ "Call History File" (text)
  iaruhq.txt - DXLog.net HQ pre-fill file
  iaru2026.adi - Writelog ADIF file (text)
  iaru2026.xdt - Win-Test "Extra Data" file (text)
  INITIAL.EX - TR4W Initial Exchange file (text)
  itu.dtb - Win-Test HQ station prefill database (binary)

N1MM and N1MM+:

1. Extract either iaru.txt (N1MM) or iaru_n1mm_plus.txt (N1MM+) from the ITU.zip file
2. From the N1MM or N1MM+ menu, select File | Import | Import Call History...
3. N1MM+:  Select iaru_n1mm_plus.txt
   N1MM:   Select iaru.txt
4. Click Open
5. From the menu, select Configure | Enable Call History Lookup
6. Enter NU1AW/0 and the logger should prefill IARU as the exchange

Writelog (TNX W5XD):

1. Extract iaru2026.adi from the ITU.zip file
2. From the Writelog menu, select Tools | Preset Exchange from ADI file
3. Select the iaru2026.adi file
4. Enter NU1AW/0 and Writelog should prefill IARU as the exchange

Win-Test:

1. Extract iaru2026.xdt to C:\ProgramData\Win-Test\Extras\
   (On Windows XP, extract to C:\Documents and Settings\All Users\Application Data\Win-Test\Extras\)
2. Extract itu.dtb to C:\ProgramData\Win-Test\Databases\
   (On Windows XP, extract to C:\Documents and Settings\All Users\Application Data\Win-Test\Databases\)
3. From the Win-Test menu, select Tools | Data Entry | Exchange Guessing | Automatically
4. Press Alt-X to view the "Extra information" window
   Right click on the window, select "Extra data files..."
   Click [Add...], select iaru2026.xdt, click OK
5. Enter NU1AW/0 and Win-Test should prefill IARU as the exchange
   "IARU" should also appear in the Extra Information window

   NOTE: For an explanation of why both files should be updated, please read this post:
   https://lists.win-test.com/pipermail/support/2017-June/016506.html

DXLog.net (TNX W9PA, SM7IUN):

1. Select File | Update database
   -or-
   Extract iaruhq.txt to %appdata%\DXLog.net\Database\
2. From the DXLog menu, select Tools | Data Entry | Exchange Guessing | Automatically
3. Extract iaru2026.xdt to a location of your choice
4. In DXLog, select Windows | Extra information
    Right-click on the window and select "Extra data files"
    Click the Add button, browse to the above selected location, select iaru2026.xdt, and click OK
5. Enter NU1AW/0 and DXLog should prefill IARU as the exchange.
   "IARU" should also appear in the Extra information window

TR4W (TNX N4TZ):

1. Extract INITIAL.EX to TR4W root directory (same location as CTY.DAT file and TRMASTER.DTA)
2. Enter NU1AW/0 and TR4W should prefill IARU as the exchange

SkookumLogger (TNX K1GQ):

1. Choose File > Update IARU HQ Call History
2. Select the IARU.TXT file in the file chooser
3. Check that NU1AW/0 prefills HQ code IARU

UcxLog (TNX OZ1BII):
 
1. Extract iaru.txt to C:\UcxLog\MEMBER\
2. Remember to delete old IARU files in C:\UcxLog\MEMBER\
3. Enter NU1AW/0 and the logger should prefill IARU as the exchange in the Membership window

73,
Bob, N6TV
n6tv@arrl.net
