[amsat-bb] Re: Looking for a G3RUH dish

Tim Cunningham n8deu at att.net
Wed Jan 4 16:14:35 PST 2012

I am not sure  Tek Sharp continues to make the patch feeds. They certainly 
do not make the tri-band feed, but I was able to get a dual band patch from 
them in June 2009 for one of their hardware cloth dishes.

Tim - N8DEU

----- Original Message ----- 
From: "K5OE" <k5oe at aol.com>
To: <amsat-bb at amsat.org>
Sent: Wednesday, January 04, 2012 4:37 PM
Subject: [amsat-bb] Re: Looking for a G3RUH dish

> Bob,
> Regarding your Cu wire dish... you might look at the Tek Sharp dishes as 
> an easier alternative to "rolling your own."  I picked one up on ebay 
> about a year ago and put it in my attic... waiting for amsat-dl :-)
> http://www.plumdragon.com/teksharp/hr_AO-40_products.htm
> Drew,
> I have a spare PF dish about 60 cm, but it is steel, not aluminum like the 
> G3RUH.  I used it on AO-40 for 24 GHz.  Let me know off-list if you want 
> it.
> 73,
> Jerry, K5OE
> ---- previous message ----
> You probably have one of the K5GNA "BBQ" dishes. The G3RUH is a solid 
> round
> spun dish.
> 73, Drew
> -----Original Message-----
>>From: Bob Bruninga <bruninga at usna.edu>
>>Sent: Jan 3, 2012 2:19 PM
>>To: 'Andrew Glasbrenner' <glasbrenner at mindspring.com>, 'amsat-bb'
>><amsat-bb at amsat.org>
>>Subject: RE: [amsat-bb] Looking for a G3RUH dish
>>> I'm looking for one of the 60cm G3RUH dishes
>>Got one, (but not available).
>>Questions:  I measured reflector grid separation as .88 inches which works
>>out to be about 0.18 wavelength.  I always thought the grid had to be
>>tighter than 0.1 inches to be an effective "surface".
>>Maybe the difference with almost double the spacing is not that 
>>(especially for a steel one which would be quite heavy.
>>Reason I am asking is that I also need another S band dish (at 70 MPH on 
>>roof of a tracking van) and we are thinking about building one by using an
>>old solid 6' TVRO dish as a form and laying in copper wire and soldering 
>>to copper straps.  With all that labor, I'd not want to get the spacing
>>Bob, Wb4APR
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