[CQ-Contest] Re:Inter-station interference

[Jan.E.Holm at telia.se]

      Couldn´t it be that the Ferrite Bead did saturate and at
      that point you would have a non linear element in the
      system and wind up with non linear secondary radiation.
      Could that be why the K3LR contest station sometimes 
      do have distortion and a wide signal on the band?
      Same also applies to other stations on the band, not
      unique to K3LR. 
      Since nobody never ever do have a problem with their
      radios maybe this is the golden culprit.

      de Jim SM2EKM
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-----Ursprungligt meddelande-----
Från:	tduffy at sygnet.com [SMTP:tduffy at sygnet.com]
Skickat:	 den 1 september 2000 04:49
Till:	cq-contest at contesting.com
Ämne:	Re: [CQ-Contest] Inter-station interference


Barry:

What I told Andy was that a certain Ferrite Bead that I was using on
my antenna feedlines was the cause of increased inter band
interference at my station.  It appears that the performance of the
bead was altered by a nearby lightning strike.

The problem I experienced did NOT involve ferrite baluns.

Please remember that my station is unique and I would be surprised if
anyone else experiences this exact problem.

Ferrite bead chokes in this application (they are NOT baluns) when
properly installed will not increase inter band interference.


73,
Tim K3LR



Barry Kutner wrote:

> I had an interesting discussion with N2NT on 2m yesterday about
> SO2R and interference between the two stations. Andy mentioned
> that K3LR found that ferrite baluns on antennas actually increase
> broadband hash noise, and after removing them, there was less
> interference between stations. Two questions:
> 1. Has anyone else verified this?
> 2. Is a Hygain BN4000 a ferrite balun?
>
> Tnx/Barry
> --
> Barry Kutner, W2UP              Internet: w2up at mindspring.com
> Newtown, PA         FRC         alternate: barry at w2up.wells.com
>
> --
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