>Does anybody have a proven design for a plate choke?
>I'm building a 160-10 (no WARC) amp using a pair of 3CX800A7 tubes, (1.5A max
>Ip). I've seen lots of plate RFC designs that use anywhere from 80 uH
>Titan), and on up.
There is a section in *Amplifiers* about hv-rf chokes:
Basically, two chokes mounted at right-angles work better than one.
>All the homebrew designers treat winding a choke as a black art. I've got
>various lengths of 1" and 1.25" Delrin rod to work with, and would like to
>#20 wire. It can't be that hard, can it?
Nope, if you do your homework. . #20 silicone-varnish wire will easily
handle 5a in hv-rfc service. #24 would be plenty for 1.5a. . Delrin
has a fairly high Dissipation-factor. G10 epoxy/fiberglass tubing is
much less likely to cause a choke fire, however, G10 tubing is not cheap.
. You need a dipmeter to assist in safely parking the resonances in
unused areas. A hand drill (held in a bench vise) comes in handy.
R. L. Measures, 805-386-3734, AG6K
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