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: http://www.electronicsparadise.com/n/Network_Switches/Dish_Network_Dish_500_Plus_Superdish_Complete_with_DP34_Switch_B001Q14KS0.htm
~73, KC2WQW On Wed, Aug 11, 2010 at 2:48 PM, i8cvs <[email protected]> wrote: > ----- Original Message ----- > From: "Ron Overdrive" <[email protected]> > To: <[email protected]> > 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 > > > > _______________________________________________ Sent via [email protected]. 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
