Miscellaneous Notes About Ferrite Beads and Baluns

Just some notes I made on a napkin while researching this, and thought I should capture it somewhere.

FB-102 and FB-124 have 1/2″ holes which are the right size for RG-8 Coax.

Mix 77 is better for 80/160 meters Mix 64 is better for the higher frequencies (10 meters and up?) Mix 43 is a good all-around general purpose mix

12 of the FB-77-1024 on a suitable length of RG-8 will have enough RF impedance along the outside of the shield to function as a good balun.  Type 73 is actually recommended, but seemingly hard to find.  Type 77 will work very well.

 

You’re welcome to share any . . .

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I Guess It’s True What They Say About 10 Meters

I’ve been hearing that the higher bands have been open, but have not been able to check it out myself.

Today, I decided to take a moment, and go see. My first stop was 15 meters. It was dead as a doornail. Well, not exactly. I did hear some local sounds that sound like some kind of telemetry going on. I live near a navy base, so you never know what you may hear. I didn’t hear any CW going on. So I moved on.

I next went to 10 meters. I didn’t expect to find much there since 15 wasn’t sharing up any CW QSOs. I tuned around . . .

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