[TowerTalk] Fwd: Fwd: Fwd: OWAs or Fans?

[Hans Hammarquist]

Beside being a monster RF choke it should be light weight to serve the purpose. I tried making an air wound on 4" pipes, but ended up with so many turns and such a weight that I hesitated to put it up. It didn't have any good characteristics anyhow.


Maybe two very thin wire with thick insulation wound around a large ferrite could do. You can use a wire pair for 50 - 75 ohms so why not something similar but getting around 200 - 400 Zo on the wire. Any ideas?


Hans - N2JFS



-----Original Message-----
From: larryj <larryj at teleport.com>
To: Hans Hammarquist <hanslg at aol.com>
Sent: Sat, Jun 18, 2016 5:59 pm
Subject: Re: [TowerTalk] Fwd:  Fwd: OWAs or Fans?

Me too - I'm very fortunate to be on a hilltop with acreage, almost no neighbors, underground utilities, no CC&Rs or neighborhood ASSociations, etc. I'm using an 80-Meter Inverted-Vee fed with ladder line, too, and would be interested in what you find out. Fortunately, up here the S-Meter sits at zero most of the time, except for summertime static crashes, occasional band noise. etc.



-----Original Message-----
>From: Hans Hammarquist via TowerTalk <towertalk at contesting.com>
>Sent: Jun 16, 2016 10:04 PM
>To: towertalk at contesting.com
>Subject: [TowerTalk] Fwd:  Fwd: OWAs or Fans?
>
>I am very fortuned not being surrounded by noise. Next door neighbor is 1000 feet away with no TV or any other RFI source and next neighbor is 1/2 mile away. Wonder if I can make a CM choke for an open feeder. Any idea?
>
>
>Hans - N2JFS
>
>
>
>-----Original Message-----
>From: Jim Brown <jim at audiosystemsgroup.com>
>To: towertalk <towertalk at contesting.com>
>Sent: Thu, Jun 16, 2016 1:19 pm
>Subject: Re: [TowerTalk] Fwd: OWAs or Fans?
>
>On Thu,6/16/2016 7:26 AM, Hans Hammarquist via TowerTalk wrote:
>> Open wire feeders are simple to use if you know to address a few things
>
>
>The thing that it is NOT POSSIBLE to address is choking the feedline at 
>the feedpoint (that is, where it junctions the dipole). This makes the 
>antenna inherently noisy in most parts of the real world. Off-center-fed 
>antennas like Windoms are even worse in that regard.
>
>This doesn't mean that they don't radiate -- that's NOT the issue. 
>There's nothing wrong with these antennas in concept, only that we as 
>hams are surrounded by RF noise sources.
>
>73, Jim K9YC
>
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