During my recent holidays in Sardinia I’ve been experimenting some portable wire antennas.
Since some years to now, I use to bring with me just a 10m fishing pole and some wires. This year I’ve decided to take with me some thoroids, copper cable, and a solder… and homebrew a balun.
One of the balun I’ve used is the 9:1 balun, an impedance transformer to feed a high impedance, end fed random wire antenna connected to my fishing pole.
These are some schematics I’ve used as reference
I’ve used a T-200 thoroid for my 9:1 Balun, thin copper cable, and a PL coax connector.
Thank you very much for sharing this information for the benefit of all ! I have been educating myself with regard to antenna feed methods, baluns, ferrites, etc., and I found your article to be very helpful and quite easy for even beginners to understand readily !
I hope that one day we may work each other, perhaps, with some propagation and lots of luck, on 6 meters, my absolute favorite amateur radio band ! I am currently particularly interested in the new WSJT-X ‘FT8’ digital mode of operation at 50.313 MHz ! It is stunning, the long distance communications that can be easily achieved on an otherwise ‘dead’ sounding band !!
73, de Mark, WN3SIX