[amsat-bb] Re: Arecibo
Rick - WA4NVM
wa4nvm at comcast.net
Sat Apr 17 05:54:56 PDT 2010
>> Luc and All,
>> I was able to copy the CW signal "fair" at times (when my local pulse
>> noise was down) today around 1840 utc with just a Cushcraft 432-20T
>> 73 all,
>> Rick WA4NVM
> Hi Rick, WA4NVM
> As far I remember the 432-20T should be a 10 + 10 elements crossed yagi.
> Do you remember if your antenna is connected for RHCP or LHCP ?
> Since Arecibo transmit a RHCP toward the moon and the moon reflects
> back a LHCP wave if you was able to copy the CW signal then your antenna
> should be LHCP.
> Please let us know if possible.
> 73" de
> i8CVS Domenico
You are correct about the antenna. It is a 10 + 10 element crossed yagi.
time I put it back up a few years ago, I didn't know what the FM birds were
RH or LH. So, I took the delay line off and hooked up both driven elements
the phasing harness "Y" in what Cushcraft called "axial radiation".
I would think this would give me the "best and worst" of everything. It
my uplink power and downlink receive "half" of what they could be if they
phased correctly. Since I don't have any way to switch polarity, I use it
on all the birds. I'm still very surprised I heard anything on this setup.
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