OT: "Flat" ferrite clamp-ons for window line

[Guy, K2AV]

Somewhere, back a while I saw someone mention that someone was selling
ferrite clamp-ons that were made to go over the typical "450" ohm
window line.  I have an immediate need for that but can't come up with
the magic word to make it pop up in Google.

Any clues, including the magic word, greatly appreciated.

73, Guy.
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[Jack Smith-6]

Search Mouser's on-line catalog using the words:  ribbon ferrite

www.mouser.com

These are made to clamp over computer ribbon cable and are available in
a variety of physical sizes and permeability. You should find both split
cores with plastic clamps as well as standard cores.

Jack K8ZOA


On 1/6/2011 2:15 PM, Guy Olinger K2AV wrote:

> Somewhere, back a while I saw someone mention that someone was selling
> ferrite clamp-ons that were made to go over the typical "450" ohm
> window line.  I have an immediate need for that but can't come up with
> the magic word to make it pop up in Google.
>
> Any clues, including the magic word, greatly appreciated.
>
> 73, Guy.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> Please help support this email list: http://www.qsl.net/donate.html
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[Guy, K2AV]

Thank you Jack and Greg.

Nothing so frustrating as knowing it's out there and can't even get
Google to find it.  Magic word aphasia most likely due to brain damage
from 500 watts on a 40m dipole 3 feet overhead in my college days (or
any other of host of excuses).

Thank you thank you thank you thank you.....

73, Guy.

On Thu, Jan 6, 2011 at 2:19 PM, Jack Smith
<[hidden email]> wrote:

> Search Mouser's on-line catalog using the words:  ribbon ferrite
>
> www.mouser.com
>
> These are made to clamp over computer ribbon cable and are available in a
> variety of physical sizes and permeability. You should find both split cores
> with plastic clamps as well as standard cores.
>
> Jack K8ZOA
>
>
> On 1/6/2011 2:15 PM, Guy Olinger K2AV wrote:
>
> Somewhere, back a while I saw someone mention that someone was selling
> ferrite clamp-ons that were made to go over the typical "450" ohm
> window line.  I have an immediate need for that but can't come up with
> the magic word to make it pop up in Google.
>
> Any clues, including the magic word, greatly appreciated.
>
> 73, Guy.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

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[Jim Brown-10]

Guy,

Look at Fair-Rite 2643167851  This MIGHT allow several turns of some
smaller window line, maybe enough to be useful at HF. Remember that you
need a complete magnetic circuit, so this makes it unlikely that ferrite
parts designed for ribbon cable will fit your need.

I assume you're attempting a common mode choke.  Take a look at the
latest version of my RFI tutorial, which shows some very nice medium
power HF common mode chokes having a Z of about 100 ohms wound on #31
toroids with #14 THHN.  You could raise the impedance by spreading the
bifilar pair a bit.  Unlikely you'll achieve a perfect match, but we
both know that's probably not a deal killer for a section of line that's
less than 1/30 wavelength at the operating frequency. :)

http://audiosystemsgroup.com/RFI-Ham.pdf

73, Jim K9YC
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