On 9/26/2025 8:34 AM, Joe Subich, W4TV wrote:
One would need at least a dozen clamp on cores to achieve a
significant (> 1K) choking impedance.
Thanks for looking up the data, Joe. I have an old K6NA bead choke
somewhere in the garage. As I recall, it's about a foot long. Maybe it
uses a dozen beads.
Clamping a dozen beads still sounds easier to me than severing the coax
and installing connectors. You could use a split toroid to accommodate
multiple turns, but I don't see an easy way to hold it all together
under stress. I can imagine some schemes, but they are pretty Rube Goldberg.
Incidentally, I used some bare clamp-on cores outdoors for several
years. When I finally took them down, I was surprised that the core
material looked like new. I mention this for interest, not because I
recommend it.
Brian
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