Tucnak 4.75

Multiplatform VHF/HF ham radio contest logbook.

  • By OK1ZIA
  • Free
  • Updated Oct 24, 2026
Download for Windows

About Tucnak

Multiplatform VHF/HF ham radio contest logbook.

What's new in 4.75

https://tucnak.nagano.cz/wiki/Changelog

Full release notes »

Technical details

PublisherOK1ZIA
Version4.75
Release date2026-10-24
LicenseFreeware
Installer typenullsoft
Architecturex86
Package IDOK1ZIA.Tucnak
Install scopeAll users

Install Tucnak from the command line

Install with Windows Package Manager
winget install --id=OK1ZIA.Tucnak -e
Update to the latest version
winget upgrade --id=OK1ZIA.Tucnak -e
Uninstall
winget uninstall --id=OK1ZIA.Tucnak -e
Silent install with the offline installer
"Tucnak-4.75.exe" /S

ham-radioradio

Tucnak version history

4.74 Sep 16, 2026
  • Repeated send to SLOVHF.net
  • Signed all DLLs on Windows
  • CHMI radar taken from opendata
  • Removed obsolete Meteox Wetteronline and Weatheronline code
4.73 Aug 20, 2026
  • New AS provider ADSB.lol, TNX to G1OGY
  • Removed ADS-B One
  • Italian activity contest scoring fix, TNX to IZ6SAC
  • New contest option Set Time At
  • Fixed KST higlight of calls with /
  • Removed 24G QSO multipliers from some wizzard templates
  • EDI prop and Responsible op fix, TNX to LZ1GHT
4.72 May 19, 2026
  • Fixed Responsible operator and EDI properties
  • KST options, opt-out C_W/names harvesting
  • All band stats double free bug fixed, TNX to OK7SE

Other versions

  • 4.71
  • 4.70
  • 4.69
  • 4.68
  • 4.67
  • 4.61

Frequently asked questions

Is Tucnak free?

Yes, Tucnak is free to download and use on Windows.

What is the latest version of Tucnak?

The latest version is 4.75, released on Oct 24, 2026.

Is it safe to download Tucnak?

The download button links to the official installer published on tucnak.nagano.cz, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 6f67af041f58e7fd5bfc855ee575089d395eaedc223075f6a1231277300e17ac.

Which Windows versions does Tucnak support?

Tucnak runs on Windows and is available for 32-bit (x86) systems.

How do I install Tucnak silently?

Run the offline installer with "Tucnak-4.75.exe" /S, or install it with Windows Package Manager: winget install --id=OK1ZIA.Tucnak -e --silent.

How do I uninstall Tucnak?

Open Settings › Apps › Installed apps, find Tucnak and select Uninstall. From the command line, run winget uninstall --id=OK1ZIA.Tucnak -e.

Alternatives to Tucnak

Other Music & Radio programs for Windows from different developers.