Have you considered the possibility of RF coming in via the house wiring and
the line cord? I have solved 2 problems with a few turns of the line cord
thru a ferrite torroid.It is a very easy thing to try. 73, Dan, N5AR
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
Behalf Of Bert
Sent: Monday, November 28, 2005 9:35 AM
To: 'Jim Brown'; amps@contesting.com
Subject: Re: [Amps] difference between 2,3,4 and 43, 45, ... materials?
Hi Jim,
I have read the suggested links on your website. Very interesting and
informative.
I suspect I have problems with a leaking cable TV system and would
appreciate some advice.
1. How to confirm that the cable TV system is leaking? (I don't have any
sophisticated equipment).
2. How to approach the cable TV company for best response and to take
action? Thanks.
73 Bert, VE3OBU
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Jim Brown
Sent: Sunday, November 27, 2005 2:12 PM
To: amps@contesting.com
Subject: Re: [Amps] difference between 2,3,4 and 43, 45, ... materials?
Sorry to be late in responding -- I've been on the road.
There's a tutorial on ferrites on my website. Select the two documents about
RF interference. One is directed to audio, but has the best tutorial
material. The other is the PowerPoint for a presentation I did to our local
ham club last spring.
Those numbers are Fair-Rite material numbers. Fair-Rite makes nearly all of
the ferrites sold as new parts in the ham market.
http://audiosystemsgroup.com/publish
Once you've studied my tutorials, you may want to study data sheets for the
various materials on the Fair-Rite website. They have an excellent pdf
catalog, which you can download. Google to find their website. There are
other good companies making ferrite parts, but they haven't found their way
into the ham radio world (except as unidentified surplus parts).
73,
Jim Brown K9YC
On Sat, 19 Nov 2005 11:49:55 -0800, Dan Sawyer wrote:
>The other has series numbers 43, 45, etc.
>What are these two series used for?
>What is the difference?
>Within a frequency range do they functionally similarly?
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