Some years ago, SDR-Kits used to sell a small prototyping PCB perfect for experimenting with a Vector Network Analyzer. After many experiments, the female pin headers on my prototyping board wore out. Since SDR-Kits no longer sells it, I designed my version of this PCB. The KiCad sources of the VNA prototyping/test board are available on my Github profile.
A few years ago I migrated almost entirely to OSX & Ubuntu. However, I still had to maintain a Windows copy on one of my hard drive partitions, since a few applications were just available for Windows. In particular, DG8SAQ’s superb Vector Network Analyzer (VNWA) software. I can already use most of the applications in a Virtual machine, with the benefit of not having to reboot and change the OS, but DG8SAQ’s software with it’s USB I/O always gave me hard time. Finally, I figured out what needs to be changed. Now the VNWA runs also smoothly in a Virtual Machine.
I was curious if the performance of our 4O3A high-power Bandpass filters could be improved with additional coax stubs in parallel. We were operating at ED1R for some time now with the added stubs, and we are pleased with the results. Check out the details!
