> Except (possibly) for protection from freeze/thaw cyless, there is no
> good reason for a common mode choke consisting of winding multiple turns
> of coax through one or more cores to be in a box at all! The "labor"
> consists of running the coax through the core(s), and if there are
> multiple cores, lashing them together with ty-wraps. If they're on a
> wire dipole, or on coax coming from a vertical, you're done. If they're
> on a typical beam, the coax at both ends of the choke simply must be
> mechanically secured to the boom. The only reason for putting this kind
> of choke in a box is so that you can sell it to someone!
>
> The lower cost bifilar-wound chokes I've designed that DO require some
> sort of packaging, but I'm not at all convinced that they needs to be in
> a BOX. What IS needed is a means of adding SO239 connectors and strain
> relief so that they can be patched into an existing transmission line.
> My neighbor, W6GJB, who is much better with mechanical design than I am,
> worked up a nice method that uses PVC plumbing parts to hold the
> connectors.
So put it in a box and leave the lid off?
Chris
KF7P
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