Re: [IRCA] More fun with wires

["Chris Black" <n1cp@xxxxxxxxxxx>]

Hi Craig,

I got back on the list after getting back from Grayland and the convention. 
It was a blast. I talked with Ray Aruda and he is officially retired from 
his get-together. I'm good with trying to do it again this year. Let me know 
what you think.

BTW, I would be happy to go to New Bedford with you and run out a thousand 
feet or so of wire.

Take care and keep in touch
Chris
----- Original Message ----- 
From: "Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>
To: "IRCA List" <irca@xxxxxxxxxxxxxxxx>; "AM-DX List" <am@xxxxxxxxx>
Sent: Wednesday, October 04, 2006 9:38 PM
Subject: [IRCA] More fun with wires


>I got my reels of wire from eBay.  I now have a 900+ foot length of black
> #14 THHN stranded, and a 425 foot length of the same wire in a brown 
> color.
>
> I rolled them out at the WDDZ-550 site this evening at dusk.  The longer
> black wire was about due south, and the 425 footer was parallel and maybe
> six feet away.  Both were connected to a home-built phaser and then onto 
> the
> Palstar R30CC in the truck.
>
> One thing I noticed right off was that 550 was considerably easier to null
> off the longer wire.  Probably because it is about a half wave at that
> frequency, and broadside to the towers.  On non-directional day pattern it
> was easy to bring 550 down so 540 and 560 were actually listenable.  On
> night pattern, the noise really jumps up for some reason, even though the
> power is only 500 watts.  But, having two point sources from two towers
> makes nulling less effective.
>
> By phasing I could switch from favoring north to favoring south.  I was 
> more
> interested in signal strength of known stations than seeing what I could 
> dig
> out.  Most of the NYC stations could be brought down considerably, though 
> I
> never could get a deep null on anything.  I may need some added phase 
> shift
> on one of the wires.  I was able to get some weak audio on the 1521 Saudi
> even though the wires didn't favor that direction.  Also some Caribbean
> sounding music on 1540.
>
> I suppose the next thing is to drag it all out to New Bedford and see what
> it does at the 1340 site.  There is also a local school athletic field 
> that
> would take the full length of wire, and that's not near any transmitters.
>
> Craig Healy
> Providence, RI
>
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