2.12 VHF and Up Contesting

XXX This page is simply a copy without screen shots of the corresponding page in the N1MM Logger Classic manual XXX

N1MM logger has some features which will be appreciated especially by VHF and up contesters. The program supports bands up to the SHF bands 10, 24, 47, 76, 142 and 241 GHz

1. VHF Options

1.1. Frequency display

The frequency is shown in the Bandmap and in the Entrywindow. When the frequency is above 1 GHz the band will be shown in cm, not the exact frequency in the Entry window. When entering QSOs it's easy this way to recognize the band in which you log.

1.2. Multiplier by Band Window

The Multiplier by Band window includes a Grid Square option. Start the program, open a VHF contest, open the Multiplier window and then click on the "Other" radio button at the bottom. You'll see the following display, centered on your grid square - the one entered on your Station Data window.


The Grid Square display has a few additional features, in a right-click menu. Click somewhere in the grid array and the following menu appears:


  • Show Calls Worked - Grid squares you have already worked are colored pink. To see which calls you've worked in a given grid, right-click on that square to bring up the menu, and then left-click on this option. A separate window will open displaying the calls and times they were worked.
  • Set Grid Center - Right-click anywhere in the grid array, and then left-click on this option. Enter the four-character grid square you want in the dialog that appears, and hit Enter.
  • Show Bearing to Grid - Right-click on a grid square, left-click on this option, and a window will open displaying the bearing and distance from your QTH to the center of the square.
  • Turn Antenna to Grid - Right-click on a grid square, left click on this option, and if you have a rotator interfaced with the program, the antenna will be turned to the correct bearing.
  • Set Rover QTH - Right-click on the square you are in, and left-click on this option, and the program will temporarily reset the reference point for bearings, etc. to your current location. Works only if you select Rover as your class.
  • Minimum Grid Square Box - Right-click anywhere in the grid array, and then left-click in this option to display a grid array with absolutely minimum-sized squares (just large enough to contain 2 letters and 2 numbers). You can toggle this off, or it will close automatically if you either close the Multiplier window or the program.

2. Gridsquare Key Assignments (VHF and up)

  • Alt+equal (=) - Search entered info from both the Callsign field and the Gridsquare field in the call history table
    • The results will be shown in the Check window
  • Alt+minus (-) - Toggle through call history and entered grid squares (max 3) in the grid square entry field
    • When no grids are found in the call history there is nothing to toggle

3. Call History Lookup

More information about this can be found in the Before the Contest chapter.

This feature is very useful in VHF contests. Lookup examples are lookups for names (Friends file in RTTY contests), gridsquares for VHF contests, ages in All Asian DX contests etc. With the importing and exporting options the call history table can be updated.

Call history lookup is enabled with the option >Config >Call History Lookup. If enabled, it will look up in VHF contests: Grid Square (max 2) and Name.

3.1. Updating the Call History File

The program itself does have a function to export the log file to (update) the call history table under >Tools >Update Call History with current log'. This function will fill the call history table with the contents of the currently selected log.

Another method used which gives more control is the separate program called Thucydides by Carel, PC5M. Check it out in the Links chapter chapter and the Third Party Software chapter..

4. Transverter Support

N1MM logger has transverter support in the form that per band an offset frequency can be set. Right click on the bandmap and select >Set transceiver offset frequency. The offset value is saved by the program so after a restart the offset is still there.


  • Band (kHz) - enter the transmit frequency of the transverter
  • IF Freq (kHz) - the frequency used between the radio and the transverter

An offset can also be added to adjust the transverteror radio to the exact frequency (like when the oscillator is a bit off).
See the 432000,12 example where a correction is being made of 120 Hz. Great to have to be right on the packet cluster spots!


If you have a radio that has 160-2m, and you want to use bandup/banddown, you'll need to put entries in for bands that you do not have transverters for, if there are gaps in bands that the radio/transverters cover. You would really have to put a lot of transverters offsets in if you want the frequencies to "wrap".

 Next Offset Band

If the next band is not defined as offset to a frequency that my radio can handle and bandup/down is used, it goes to an HF frequency (without offset).

  • It does not work if your radio does not accept the calculated frequency. For example, set up for Band: 144000 and IF freq: 28000 and you put in 146100 and your radio can't go to 30100, you will get strange results
  • Remember to enter the frequency of the transceiver and not that of the transverter when going into split mode (Alt+F7).

5. VHF Beacons

N1MM logger is capable to show beacons in the bandmaps for a defined period of time. Normally every spot in the bandmaps will disappear after the 'Packet Spot Timeout' which is valid for every spot in the bandmap. The same for beacons coming in as spots. So an extra import option has been added for beacons with where the spot timeout can be set to a much higher value (like days or even weeks).

Importing beacons and showing them in the bandmaps for the bands can be done by importing a text file in a specific format. Enter the text BEACONS in the Entry window callsign field and a file selection dialog will open where a .txt file (with beacons in the correct format) can be imported. An example beacons text file can be found in the N1MM logger program directory (called Beacons.txt). In the beacons text file lines with a # are remarks, the first line in the text is the timeout for all beacons in hours. Every line with a beacon must contain callsign, frequency (in kHz) and grid locator (4 or 6 digit). The frequency may be in either US (50000.25) or European (50000,25) format. A comment per beacon is optional. Note the ; as separator (don't forget one or it won't import). Below an example beacons.txt file.

# Hours to stay in bandmap (mostly > 24 or > 48)


# Call beacon;Frequency;Grid;Comments


PI7CIS/B;144416,2;JO22DC;Should always be heard

DL0PR/B;144486,3;JO44JH;Switches power!

GB3VHF/B;144430.4;JO01DH;QRG with a .

ON0VHF/B;144418,5;JO20;4 digit grid

A file with beacons in the correct format for Europe (Region I) can be found on the N1MM website under 'Other Files' in the 'Download' menu.

 The NCDXF/IARU Beacon Network

No need to add the NCDXF/IARU Beacon Network on 14.100, 18.110, 21.150, 24.930 and 28.200. They are already incorporated in the program and the beacon transmitting at that time (when your PC clock is correct) will be shown in the Entry window statusbar when you are listening on one of these frequencies.

6. Example Contest Setup

Additions are welcome!

6.1. Create (Days Before the Contest)

  • New master.dta file
  • Create 'N1MM logger.ini' to use during the contest
    • Setup all the program setting and place the windows as you like them during the contest (on the computer to use)
    • Don't forget the tab 'Mode Control' in the Configurer.
    • After closing the program it has created a file called 'N1MM logger.ini 'with all the settings
    • Copy 'N1MM logger.ini' (not .init) to ' VHFsettings.ini'.
  • Text file with contents Function keys for SSB/CW
    • As a start:
      • 'File | Export | Export Function Keys to file... | SSB Function Keys'
        • Give a name like: VHFssbfunctionkeys.mc
      • 'File | Export | Export Function Keys to file... | CWFunction Keys'
      • Update these text files if needed
    • Check possible macros in the Macros chapter
  • Packet/Telnet button text file
    • As a start: >File >Export >Export Packet/Telnet Buttons to file...'
    • Update this text file if needed
    • Give a name like: VHFpacketbuttons.txt
    • Check possible macros in the Macros chapter like {GRIDSQUARE}
  • Lookup database text file for the VHF contests to use
    • Create a text file with callsign, name, locators etc.
    • Give a name like: VHFlookup.txt
    • See info about CallHist file
  • SSB: Wav files for CQ, rst, exchange etc.
    • Create wav files for all operators
    • See {OPERATOR} macro in the Macros chapter
  • Download up to date country file (cty.dat)
    • mostly a country file is not used for VHF and up contesting but the program gives information in the Info window about the logged callsign so download the latest version
  • Check if the selected contest is still ok, make some test QSOs
    • This should be done weeks before the contest!
  • ....

6.2. Before Starting the Program

  • Copy the created master.dta file in the N1MM logger program directory
  • Copy the wav files from all operators in the WAV directory
  • Turn off Windows sounds if using WAV files
    • Windows >Control Panel >Sounds - Scheme: No Sounds
  • Rename ' VHFsettings.ini'. to 'N1MM logger.ini' and copy it into the program directory
    • The program will start using the settings as set up days before the contest

6.3. After Starting the Program

  • Select/Check if correct database is used
    • >File >Open Log in Database, select VHF database'.
  • Import
    • This has to be done only once if every time the same database is used!
    • Each database can handle many contests and thousands of QSOs, don't use a database for every contest!
    • Updated files (like the lookup file) have to be imported before every contest.
      • The function keys macros (SSB/CW)
        • >File >Import >Import Function Keys to file... >SSB Function Keys. Use file created above (Example: VHFssbfunctionkeys.mc)
        • >File >Import >Import Function Keys to file... >CW Function Keys. Use file created above (Example: VHFcwfunctionkeys.mc)
      • The packet/telnet buttons
        • >File >Import >Import Packet/Telnet Buttons from file... Use file created above (Example: VHFpacketbuttons.txt)
      • Lookup file
        • >File >Import >Import Call History File. Use file created above (Example: VHFlookup.txt)
      • Country file
        • >Tools >Import country list from downloaded file. Use file downloaded/updated above
    • Check Station dialog (>Config >Change your Station Data)
    • The locator from this dialog is used for distance calculation so needs to be entered!
  • Check contest ( >File >Choose Which Contest to Log)
    • Check if entered information is correct.
    • Enter Sent Exchange (this is contest specific, see Setup Contests chapter)
  • Setup configuration (Rig control, PTT, CW)
    • Check Configurer >Mode Control tab
  • When using a transverter, enter offset for bandmap A and bandmap B
  • ....

Have fun during the contest!

Last Modification: 17 October 2015 10:08:47 EDT by VE3KI.