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 <bruni...@usna.edu> >Sent: Jan 3, 2012 2:19 PM >To: 'Andrew Glasbrenner' <glasbren...@mindspring.com>, 'amsat-bb' ><amsat-bb@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 significant? >(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 the >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 it >to copper straps. With all that labor, I'd not want to get the spacing >wrong. > >Bob, Wb4APR > _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
