[K3] Ferrite beads on TMP cables

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[K3] Ferrite beads on TMP cables

K1LI
I want to do some experiments placing ferrite beads on the TMP cables that
carry so many signals around the inside of the K3. I can't find the
dimensions of the SP060022 connectors on the cables and I don't have a set
of calipers to make an accurate measurement. Does anyone know the location
of an engineering drawing of this connector? Nothing shown on the web site
of Circuit Design, Inc.

--
73 -- Brian -- K1LI
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Re: [K3] Ferrite beads on TMP cables

mzilmer
They're probably Taiko Denki.

http://www.scsiglobal.com/Vendors/Taiko_Denki/29tmp-S.pdf

Matt Zilmer
909-394-6052

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of Brian Machesney
Sent: Monday, April 05, 2010 12:43 PM
To: Elecraft Reflector
Subject: [Elecraft] [K3] Ferrite beads on TMP cables

I want to do some experiments placing ferrite beads on the TMP cables that
carry so many signals around the inside of the K3. I can't find the
dimensions of the SP060022 connectors on the cables and I don't have a set
of calipers to make an accurate measurement. Does anyone know the location
of an engineering drawing of this connector? Nothing shown on the web site
of Circuit Design, Inc.

--
73 -- Brian -- K1LI
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Re: [K3] Ferrite beads on TMP cables

Mark Bayern
In reply to this post by K1LI
>From a message on this refector dated Aug '08:

<http://www.spectrum-component.com/Vendors/Taiko_Denki/29tmp-S.pdf>

This drawing has the dimensions for TMP connectors.

However, what are you expecting the ferrite beads to accomplish? There
shouldn't be any currents on the outside of the coax cables.

Mark  AD5SS





On Mon, Apr 5, 2010 at 2:42 PM, Brian Machesney <[hidden email]> wrote:
> I want to do some experiments placing ferrite beads on the TMP cables that
> carry so many signals around the inside of the K3. I can't find the
> dimensions of the SP060022 connectors on the cables and I don't have a set
> of calipers to make an accurate measurement. Does anyone know the location
> of an engineering drawing of this connector? Nothing shown on the web site
> of Circuit Design, Inc.
>
> --
> 73 -- Brian -- K1LI
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Re: [K3] Ferrite beads on TMP cables

K1LI
Thanks to those who sent me a link to the drawing.

In response to several queries I received, I agree that there *should not
be* any currents flowing on the outsides of the coax cables. As far as I
know, that doesn't mean that there *are* no currents on the outsides of the
cables. I think that putting ferrites on the some of the cables is a good
way to see if there are currents or not. Now that I have a possible source
for the connectors, I may make up my own cables and give them a try. That's
one of the reasons I love having a radio I built - or, in this case,
assembled - myself. It's a great learning vehicle.

In response to other queries as to what might go wrong, I can't imagine why
putting ferrites on the outside of the coax would affect the signals
traveling on the inside of the coax. If someone can illuminate me, I'm all
ears.

Brian K1LI


On Mon, Apr 5, 2010 at 2:42 PM, Brian Machesney <[hidden email]> wrote:
> I want to do some experiments placing ferrite beads on the TMP cables that
> carry so many signals around the inside of the K3. I can't find the
> dimensions of the SP060022 connectors on the cables and I don't have a set
> of calipers to make an accurate measurement. Does anyone know the location
> of an engineering drawing of this connector? Nothing shown on the web site
> of Circuit Design, Inc.
>
> --
> 73 -- Brian -- K1LI
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Re: [K3] Ferrite beads on TMP cables

Mike Scott-7
In reply to this post by K1LI
>However, what are you expecting the ferrite beads to accomplish? There
>shouldn't be any currents on the outside of the coax cables.

There are always currents running on the outside of coax cables unless
perfectly terminated at both ends which they never are.

Mike Scott - AE6WA
Tarzana, CA (DM04 / near LA)
NAQCC 3535
K3-100 #508 / KX1  #1311


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