Re: [amsat-bb] Helix Feed with Cup--Dimensions

["Greg D." <ko6th_greg@xxxxxxxxxxx>]

Hi Jerry,

Not to be too picky, but I want to get the details right...

Is the 1.6" diameter the inside or the outside of the #10 wire?

Also, I've never seen a dimension of where exactly the N connector
is positioned.  How far out from the center line is it?

Thanks,

Greg  KO6TH



>From: K5OE@aol.com
>To: <amsat-bb@AMSAT.Org>
>Subject: [amsat-bb] Helix Feed with Cup--Dimensions
>Date: Tue, 29 May 2001 07:49:32 EDT
>
>I received several requests to repeat the dimensional data for this little 
>whimsical Memorial Day effort.  FWIW, I listened for AO-40 early this 
>morning, before leaving for work, at around MA=50 and could not hear a 
>thing--beacon or RUDAK.  Anyone in N.A. have a report to compare at the 
>same time?  I'll try again tonight when the squint will be more favorable.
>
>The dish is one of K5GNA's smaller dishes (22" x 17"
>x 3-1/2" deep).  It is covered in aluminum screen.
>
>The helix is 3 turns # 10 AWG Cu, 1.6" dia. at 1.125" spacing and 
>terminates in an N-connector.  The first 180 degrees is covered in 1/4" and 
>the remainder of the first turn is covered in 1/2" (3/4" for first turn).  
>The remaining two turns are at 1.125" spacing.  Polarity is LHCP.
>
>The "cup" measures 4" in dia and 2" in height.
>
>The final spacing was 12" to the back of the coffee can.
>
>Here are the pix:
>http://members.aol.com/k5oe/helix_cup01.jpg
>http://members.aol.com/k5oe/helix_cup02.jpg
>http://members.aol.com/k5oe/helix_cup03.jpg
>http://members.aol.com/k5oe/helix_cup04.jpg
>73,
>Jerry, K5OE
>
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