[amsat-bb] Lindenblads

[David G0MRF]

Hi Robin.
 
If you want to monitor satellite telemetry, e.g. AO-73, or listen to the strong signals from the ISS, then the Lindenblad is a great choice.
 
However, if you want to make QSOs via the satellites I believe you will need an antenna with some gain.
 
Of the satellites that are available, SO-50 has quite a weak downlink.  Meanwhile, the available linear transponders by their nature divide the available power between the users. It's always an advantage to have a good receiving system and an omnidirectional antenna is unlikely to be an optimal solution.  Circular polarisation however is a definite advantage.

Let us know how what choices you make and how you get on.

Good luck

David  G0MRF
 
 
-----Original Message-----
From: Robin Midgett <K4IDC at comcast.net>
To: AMSAT-BB <amsat-bb at amsat.org>
Sent: Mon, 15 Sep 2014 6:23
Subject: [amsat-bb] Lindenblads


Hello to the group,
I'd like to hear from any users of the Lindenblad antennas regarding
switching polarity & circularity.
Based on the article on the AMSAT web page by W6SHP at
http://www.amsat.org/amsat/articles/w6shp/lindy.html, I'm led to believe
that the maximum effect comes from having one Lindy for each of RHCP & LHCP
per band in addition to being able to invert the polarity of each.
I'd like to hear from users concerning how often switching between RH & LH
circularity yields benefits as compared to switching polarity on a single
Lindy.

I've long had an interest in satellite operation. Due to being involved
with a recent ARISS event, the interest level has been elevated..it's time
for me to get on the birds. I welcome your input regarding the Lindenblad
antennas.
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