Re: [amsat-bb] S-Band Antenna Comparisons, etc.

[Clifford Buttschardt <cbuttsch@xxxxxxxxxx>]

Yes yes, YES.  I understand and I thought that might be the case.  I have
been observing much the same.  Best indicate the circumstances and go
from there.  I am REALLY disappointed in my system.  Cliff K7RR



On Sun, 7 Jan 2001 K5OE@aol.com wrote:

> cbuttsch@slonet.org writes:
> 
> > Jerry, it is not clear to me if the dish antenna is linear or were you
> >  able to compare both with RHC?  Truthfully, I have had a devil of a time
> >  with the small dish and about ready to go to the helix regardless of gain.
> 
> Hi Cliff.
> The dish is linear (Andrew T-2400 feed with a reflector reminiscent of the 
> Parabeam designs of old) and it made no difference whether horizontal of 
> vertical.  Both helices are RHCP.  Given the obtuse squint, I would not make 
> any assumptions nor any extrapolations about circular polarity at this time.  
> 
> My comments about the sharpness of the pattern though, are quite serious:  
> half the gain of this large antenna is lost if accurate tracking is not 
> maintained within a few degrees.  I've never aimed a dish like this at a 
> satellite before and I was surprised by how sensitive the pointing is--this 
> is not like waving your Arrow Antenna at AO-27!
> 73,
> Jerry, K5OE
> 
> 
> 
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