Topband: Reducing Noise in the Shack

[DAVID CUTHBERT]

I don't like diff mode only filters because they have diff mode to common
mode conversion due to component tolerance.

I don't see a fuse in the NQN filter and it us rated for only 7 amps. To be
used on a 20 amp circuit without an internal fuse it must be able to handle
20 amps. I assume it's not UL listed?

Dave WX7G
On Jun 21, 2012 1:07 PM, "Guy Olinger K2AV" <olinger at bellsouth.net> wrote:

> 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.
>