There is still some interest for this unit and I occasionally get question about how to build one.
And for anyone thinking of building one of these, I say forget it. First: PCB’s, well you will have to either build one yourself or find a spare from someones junk box. Second: The performance of the extender do not justify part costs. Third: Performance, extender messes up phase readings making it a scalar network analyzer with limited dynamic range.
Despite it can’t be used as a VNA the extender is still usefull as a SNA and as a simple antenna analyzer.
Here are some pictures of my extender for the MiniVNA.
First edition: 06.11.2008
Lastest edit: 10.01.2012