[amsat-bb] Re: Sat Dishes and P3E Q's

Ron Overdrive ronoverdrive at tehfurry.com
Wed Aug 11 12:15:46 PDT 2010

Honestly I haven't measured the dishes nor know what you mean by prime focus
or offset dish. Like I said I don't know much about parabolic dishes. All I
know is they're not perfectly round, but more elliptical. Did a quick search
online the smaller one that I believe is a Ku-Band dish looks exactly like
this: http://www.amazon.com/DISH-Network-Satellite-Twin-Plus/dp/B001IQKY9M .
The larger one is very wide and looks somewhat like this:

~73, KC2WQW

On Wed, Aug 11, 2010 at 2:48 PM, i8cvs <domenico.i8cvs at tin.it> wrote:

> ----- Original Message -----
> From: "Ron Overdrive" <ronoverdrive at tehfurry.com>
> To: <amsat-bb at amsat.org>
> Sent: Wednesday, August 11, 2010 7:33 PM
> Subject: [amsat-bb] Sat Dishes and P3E Q's
> > I am curious how things are coming along with Phase 3 Express (P3E) as
> the
> > current official websites don't tell me much. The last bit of updates
> seem
> > to be from 2005 with an expected launch date of 2007 - 2008 which was 2 -
> 3
> > years ago. Since there's no info about it being active I'm guessing P3E
> > hasn't be launched yet.
> >
> > The reason I'm asking is because I came across 2 Dish Network dishes that
> a
> > friend had sitting in his junk room that he acquired from the previous
> owner
> > of his home. One is a smaller dish labeled Dish 500 which I'm guessing is
> a
> > Ku-Band dish and a larger one labeled Dish Plus which I'm assuming is a
> > C-band dish. As you probably have guessed I want to use these for AMSAT
> work
> > and I don't know much about parabolic dishes so all I have are guesses
> for
> > what bands they work on so if anyone can point me in the right direction
> to
> > figure this out please do.
> Hi Ron,
> You don't mention wath is the diameter of your dishes and if they are prime
> focus dishes or offset dishes.
> By the way Ku-Band or C band dishes are good for P3E but in order to
> designe
> the type of feed it is necessary to know the dish focus /diameter i.e the
> F/D ratio.
> For 2400 MHz on OSCAR-13 and AO40 I have used with good results a 4"
> diameter prime focus dish with a F/D ratio of 0.45 and I plan to use the
> same dish for P3E
> 73" de
> i8CVS Domenico

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