Multiband Antenna Switching

When I first started on this project I think my goal was to “magically” handle SWR on several bands and my area of focus was on using an UNUN or Current Choke to do so. They did do what they were supposed to – to a point, but there was no “magic” there. They did bring the match “close” to the range of the…

KY6R Inverted L Switched Transformer Match

I’m very pleased to have it all wired and working. My original plans did have a logic – wiring bug – the first relay really needed to be in a default NC mode (no power), and I needed a third voltage line to activate it to be in the 1:1 current choke – or direct feed to antenna mode. I tried to get away…

Updated KY6R Switched Matching Circuit

Per Ed, AG6CX’s suggestion, I’ve moved the 1:1 current choke so its the input for all paths in the switched circuit. Another 1:1 current choke should be added behind the tuner. It simplifies the circuit – two relays can be eliminated. The main thing I wanted was to make sure there are never two incoming feeds attached to the vertical and ground at the…

Switched Transformers (Great Input from Ed, AG6CX)

I met Ed at Pacificon this year, and he has built some very nice matching devices and also shares a love for Johnson Viking Matchboxes. Our discussions have really helped me learn, and more than just getting some validation on things that I am experimenting with – our discussions help push me forward in the learning space. I have also enjoyed such conversations with…

The KY6R Inverted L Switched Matching for All Bands

Schematic drawn by KY6R using Circuit Lab – an excellent web browser based tool. I use the same relays as Array Solutions does in their gear: Deltrol 20852-81 12v 35a DPDT – $13 at Galco I went over the Rig Experts AA-30 SWR plot and found that on every band from 160-10M, one of three UNUN’s or 1:1 Curent Choke will keep the SPE…