Friedrichshafen 20-22 June 2007. Travelled together with Mark, PA5MW and Aurelio, PC5A, to visit this European “Dayton” event. Nice to see that our hobby is still alive and kicking.
Most important event for me was to meet Bob, KK6EK and his wife Kay. Easter Island, XR0Y, was an expedition organized by Bob to never forget.
Some pictures of our happy meeting will be posted here soon.
At the fair I bought a miniVNA network analyzer. This neat little box contains a real VNA using modern ICs (main building block are formed by a microprocessor, DDS and a directional coupler). See http://www.miniradiosolutions.com for more details.
After some tedious installing issues (too many USB devices with the same driver software on one PC …), I conducted some measurements on my homebrew 4-ele 50MHz beam which is currently in the garden. I put the beam on a 6m pole and started to measure it. Here are the results using Zplots+ by AC6LA (Zplots website).


This antenna uses a hairpin + 1:4 balun match (low Rs, rel. high capacitive reactance + hairpin => 200ohm + 1:4 coax balun => 50ohm unbalanced). As you see it behaves quite well over the intended band (50.0-50.250MHz). A quick check with my IC-706MKII confirmed this.
All in all a very neat little package with a lot of power to do measurement in the field using it together with a laptop.