Hi Charlie,
You are right, and you can thank Jim, K9YC for that. I used 14 turns of
CAT5 on a 2.4" OD #31 ferrite core, per his suggestion. Photo attached.
Out of all the info I have ever read on ferrite materials and common-mode
chokes --either in print or on the Web-- Jim's info at
http://audiosystemsgroup.com/RFI-Ham.pdf has been the most valuable to me.
73, Mike
www.w0btu.com
On Wed, May 22, 2013 at 12:34 AM, Charlie Cunningham <
charlie-cunningham@nc.rr.com> wrote:
> I would think 31 material would be great for RF control and suppression on
> things like CAT5 cables, telephone circuits, audio circuits etc.!
>
> Regards,
> Charlie, K4OTV
>
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Mike
> Waters
> Sent: Wednesday, May 22, 2013 1:01 AM
> To: topband
> Subject: Re: Topband: Thanks!
>
> That's true, but 31 material is the closest thing I've come to a "magic
> cure" here, for several applications in the past year! :-)
>
> It's the ONLY material that kept 75 meter RF from getting into my shack
> computer's CAT5 LAN cable (etc.), and it worked perfectly as a choke balun
> on a G5RV-type antenna I experimented with last year.
>
> 31 almost ought to be one of the definitions of "magic" in the dictionary.
> :-)
>
> 73, Mike
> www.w0btu.com
>
> On Tue, May 21, 2013 at 9:07 PM, Tom W8JI <w8ji@w8ji.com> wrote:
>
> >
> > 31 isn't a magic cure-all, ...
>
>
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
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