[RFI] Common Mode RFI

Cortland Richmond ka5s@earthlink.net
Thu, 5 Dec 2002 2:53:5 -0800

re Snap-on ferrites as common-mode tester, I've been using 
this for some years. Ad hoc test equipment. Great minds must 
think alike (heh).   However, they don't replace a Solar or 
Eaton (or the like) snap-on current transformer  -- which 
I've got. They are just MUCH less expensive. 

I found one of the Palomar current meters on e-Bay, too. Those
are no longer in production. MFJ makes a tunable current probe 
using an electrostatic shield around a ferrite rod, too; I've 
retuned one for AMBC and used it on telecomm gear near a radio 


> [Original Message]
> From: Jim Smith <jimsmith@shaw.ca>
> To: <rfi@contesting.com>
 > Date: 12/4/2002 10:25:07 PM
> Subject: Re: [RFI] Common Mode RFI
> QST August 2000 p.42
> 73 de Jim Smith    VE7FO
> Germino wrote:
> >   QST has had a couple of construction projects about this type of
> >tester.  It only gives a relative reading, but it is very useful.