>From: Sinisa Hristov <email@example.com>
>Reply-To: Discussion of Ten-Tec Equipment <firstname.lastname@example.org>
>To: Discussion of Ten-Tec Equipment <email@example.com>
>Subject: Re: [TenTec] RFI question for Orion and other TT rigs
>Date: Sun, 26 Jun 2005 16:25:04 -0400
> > The use of aluminum instead of ferrous material (steel) for chassis,
> > separate compartments, etc. is probably one of the greatest reasons TT
> > rigs are more RFI prone.
>Aluminium provides more than adequate shielding against
>both magnetic and electric fields at shortwave frequencies.
I am not sure about the effectiveness of aluminium in shielding "magnetic"
fields. It seems that a high mu metal is the way to go for magnetic
shielding. That is what they used on CRTs to prevent magnetic interference.
>But plastics do not, and Orion's CPU, DSP's, AD and DA converters,
>front panel LEDs and keys are "shielded" by plastic only.
Certainly agree here.
>Sinisa YT1NT, VE3EA
73, Jim wd4air
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