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Re: [TenTec] Argo RF In to computer Speakers..

To: "tentec@contesting.com" <tentec@contesting.com>
Subject: Re: [TenTec] Argo RF In to computer Speakers..
From: "Jim Brown" <jim@audiosystemsgroup.com>
Reply-to: Jim Brown <jim@audiosystemsgroup.com>,tentec@contesting.com
Date: Wed, 11 Aug 2004 07:08:33 -0500
List-post: <mailto:tentec@contesting.com>
On Wed, 11 Aug 2004 03:10:01 -0400 (EDT), Larry Greenberg N5BEA wrote:

>What do I need to do keep hearing myself in the external computer speakers? 

This is caused by the cable to these loudspeakers acting as an antenna, and a 
pin 1 problem inside either the computer's sound card or an active amplifier in 
the 
external loudspeaker. Winding the cable that feeds them multiple turns through 
a 
ferrite toroid will usually reduce the current enough that the interference 
will 
become inaudible. The number of turns required depends on the type of ferrite 
and the transmitter frequency (lower frequencies require more turns). 

Jim Brown  K9YC 


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