I am amazed at how many people take things stated out of context on this reflector. I never said that any of the arrays would not work due to being too narrow for satellite work. An individual asked about the problem they were having hearing the satellites and it was stated that if none of the other suggestions worked to consider that the arrays they are using are pointed correctly in the correct direction of the satellite. Pointing being off, the nulls could easily block the satellite's reception. The larger the array the more this might be evident. The larger the array, stacked arrays and even dish antennas, pointing becomes a bit more critical.
Reid, W4UPD
John Geiger wrote:
I have used a Cushcraft 13B2 (13 elements) on 2m and a Cushcraft 719B (19 elements) on 70cm on the satellites with no problem. Didn't experience either as being too narrow beamwidth for sat use.
73s John AA5JG
--- On Mon, 11/30/09, wrb [email protected] wrote:
From: wrb [email protected] Subject: [amsat-bb] Re: Icom 910H vs Kenwood TS2000 To: [email protected] Cc: [email protected] Date: Monday, November 30, 2009, 2:11 PM Your antenna plan is not bad, you just to make sure that their pointing (direction) are reasonably accurate. The larger the array, the higher the gain, the more narrow the beam width. The 11 element array pointing comment was just to be sure that that individual was reasonably close to the direction of the bird. Off pointed and he could be experiencing the problem he is seeing of not hearing the bird(s). If was meant only as another suggestion to look at.
When I get my rotator fixed, I plan on putting the KLM two meter 22 element and 70 cm 40 element arrays back up. They worked extremely well on AO-7 and the HEOs that once circled the heavens.
Reid, W4UPD
Tom wrote:
Thanks for all of the great information. Since both
the TS2000 and IC910H
have been around a while I believe that most of their
'problems' have been
at least discovered. So, in that respect, I'm leaning
away from the "still
to be debugged" IC-9100. Also new rigs always are
priced high in the
beginning of their life, as we all know. I know that
some of the ham dealers
are offering "Closeout" prices on the 910H but I
didn't see much difference
from previous pricing.
Not to prolong this thread but Jerry's append (below)
brings up another
question. How much antenna is "too much" for satellite
operation. Someone
earlier mentioned that an 11 element yagi might have a
beam width too narrow
to closely follow an LEO bird. I had planned on using
yagis with 13 elements
on 2M and 18 els on 70cm. Is that a bad plan?
Thanks again. Tom, KØTW
Hi; I have owned the Ft-736 R and the Ft-847,
which I am using now.
No matterwhich rig you decide to buy the most important thing
isthe antenna system.