Toroid for use as HF/VHF balun, unun
A professional-grade core selected and tested by SOTABEAMS for 125 Watt 1:1 and 4:1 baluns; 3 - 50 MHz.
For higher power use, the cores can be stacked.
Toroid cores are brittle so avoid banging them against hard surfaces.
Toroid core weight = 14 grams
OD = 29 mm ID = 19 mm
Equivalent to type 43 material
Typical Application
1:1 Baluns should be wound as shown in the diagram below.
Each pass through the hole in the toroid is a turn.
For 50MHz 3 + 2 turns of RG58 is recommended.
For HF 7 +6 turns of RG174 is recommended.
Hold the ends in place with cable ties.
5 Reviews Hide Reviews Show Reviews
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Useful Torroid
I bought this to make my own 9:1 UnUn for my end-fed wire antenna. It was big enough to get the necessary number of turns which was helpful. Basically it just works! The UnUn tames the impedance so that I can tune 160 - 12 m. I would certainly buy it again.
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Good price, good funktion.
I have used some of these rings instead for FT 118-43 and it seems to be similar values.
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Toroid
This is the real deal, good quality toroids at the right price.They come well packaged ready for my project.
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As expected
The toroid do the job. Not a fake toroid as many in today's market!
1:1 to 1:1.3 from 3.5 to 28 Mhz.
Happy with it and I would buy again if necessary. -
Balun core
Just the job.
Light weight and easy to wind.
Gave a 1:1 on 80m with no real measurable return current.
1.3:1 on 10m both at 100W
Happy with that.
Would recommend this core to others
