I've updated the user guide for vna/J.

The firmware update function is now available, even if no calibration data is loaded. This update relates to this post.

Please check it here.

You can buy the author a beer to support the further development of vna/J.

Please use this PayPal link.

Many thanks in advance for this donation!

You can contact me by email icon or 

2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.