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Re: [RFI] Receiver settings for hearing RFI?

To: rfi@contesting.com
Subject: Re: [RFI] Receiver settings for hearing RFI?
From: Sam Morgan <k5oai.sam@gmail.com>
Date: Mon, 12 Mar 2012 13:53:09 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
that was my experience also
I live in an 80 unit apartment complex, spread over 8 buildings
lots of noises from lots of directions

it turns out the MFJ-856 can do wonders
only if
the situation meets a number of requirements

you are able to get the signals up to
equal levels with your main antennas signal strength
for the phasing/nulling to work

your noise problem must be a single source

but if, like me, your noises are from multiple sources your sol
or if the offending noise is coming in atmospherically, forget it
then the unit is as useful as junk

if your problem is a single source
and if it is line of sight type distances (not atmospheric)
and the strength of the noise can be matched on both antennas
and lastly, you are damned patient in finding the correct settings
then it works pretty well

GB & 73
Sam Morgan

On 3/11/2012 8:36 PM, KD7JYK DM09 wrote:
> : http://www.mfjenterprises.com/Product.php?productid=MFJ-856
> The experience of two hams that used one of these and myself who wound up
> with it...  Garbage.  No, not defective, but no selectivity, no directivity.
> Although one would think it works in theory, in real world operation, it
> picked up noise great, in all directions, equally well, rendering it
> useless.  Last I heard the receiver was on a shelf somewhere and the antenna
> scrapped for other antenna experiments.  The noise, about two dozen sources,
> was pinpointed using other equipment in about an hour.
> Kurt
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