Tag Archive: Balun


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…

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20M vertical

After deciding that my doublet works better than the multi-band vertical that I built from a 10M fishing pole, I decided that I wanted to try a mono band vertical.

20M seemed the obvious choice as I could use the 10M pole to create a 1/4 vertical with radials.
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After making a batch of nice folded dipole elements on my diy jig, I needed to work out how to mount them and  feed them with 50 Ohm coax. The feed point impedance should be 200 Ohms so I needed a 4:1 balun.

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