I needed a 1:1 balun to use with my home brew doublet but I needed it to go between the ladder line and the SGC-230 tuner so it needs to have stud terminals on both the input and the output. I took a look around and decided that making one was the best option.
It’s made using 11 turns of figure 8 twin lead on two stacked FT240-43 cores. See the pictures below…
Parts ready to go.
Holes drilled.
Toroid wound.
Soldered in place.
Potted with casting resin.
Done.
Installed between the ATU and doublet.
Mat who supplies your balun project boxes,by the way I found a 4-1 balun Homebrew check it out very good ,M0PZT he’s got interesting site also has website hamradiogoodies.com torroid ect worth a look ,thanks Mat my project boxes suck ,cheers ,Dave
Hi Dave.
I get my boxes from Maplins. This is the one I used for this project…
https://www.maplin.co.uk/p/ip55-weatherproof-box-light-grey-100x100x60-ym90x
I know Charlie (M0PZT) at http://www.hamgoodies.co.uk and can vouch for his products.
Have fun building!
Matt