Subject: [AMPS] B+ "Choke in a Can" question
>
> Looking at the B&W BBC-5K RF choke (for B+), it's in a can. Two
> feedthru insulators come out of the can to get to either side of the
> choke.
> Seems that this would be an excellent method to control the well-known
> "choke resonances depend on the electro/mechanical layout" problem.
> Does anyone have any comments/experiences why one wouldn't want to do
> this when homebrewing chokes/amps?
It's not really a "can." It is PVC.
Resonances are eliminated in this choke by a ferrite rod inserted into the coil
form. This scheme has been well documentated in ham radio publications, and
used in thousands of amplifiers made by Harris.
The B&W was never popular in the amateur service because it is VERY large.
(((73)))
Phil, K5PC
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