Topband: Reducing Noise in the Shack

[ZR]

Differential mode filtering goes inside the outlet strip and ferrites on the 
outside take care of common mode on my filters.

Ferrites can be externally added to any DM only filter.

Carl
KM1H


----- Original Message ----- 
From: "Guy Olinger K2AV" <olinger at bellsouth.net>
To: "DAVID CUTHBERT" <telegrapher9 at gmail.com>
Cc: <Topband at contesting.com>; "Wayne Willenberg" <wewill747 at gmail.com>
Sent: Thursday, June 21, 2012 3:07 PM
Subject: Re: Topband: Reducing Noise in the Shack


> On Thu, Jun 21, 2012 at 2:59 PM, DAVID CUTHBERT 
> <telegrapher9 at gmail.com>wrote:
>
>> The W7NQN line filter is a differential-mode filter. You need a filter 
>> that
>> is designed for common-mode filtering.
>>
>> Dave WX7G
>
>
> This is from the web page advertisement:
> ---------
> Compare this with a Brand "C" filter which only handles common-mode
> interference problems.  The NQN AC power-line filters are optimized for
> common-mode and differential-mode filtering and have about 3 times the
> components of brand "C".
> ---------
>
> Seems to specifically include common mode.
>
> See  http://arraysolutions.com/Products/nqnaclinefilter.htm
>
> 73, Guy.
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
>
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