[amsat-bb] Re: Arecibo
ko6th_greg at hotmail.com
Sat Apr 17 17:12:12 PDT 2010
So, I had pretty marginal copy in both SSB and CW, neither of which were quite good enough to hold a QSO. The odd thing is that CW did NOT improve things, even with the narrow filter on my FT-736R.
The antenna is a 2x16 CP thing I picked up at a swap meet (so I don't know the brand). My copy was better with the CP relay UN-energized, so either it's wired backwards, or something is broken. On the man-made satellites, I have used both polarization settings, so I know they both work. Puzzle.
There's also a no-name preamp up there, after a bit of coax to get around the rotor. Below the preamp is mostly hardline. Turning on the preamp results in a small but noticeable rise in the base noise floor, so I believe it is working. And I Just got down from the roof, after checking the aiming using the sun. No problem there. I even played with my W9GR DSP box, trying to pull out the signal. Didn't help much.
Don't get me wrong - it was a thrill just to hear the moon. But what's wrong with my setup? The only other thing I can think of was that the moon was north-east of me at the time, and that means aiming through a bit of oak tree. Is that the problem?
> Date: Sat, 17 Apr 2010 16:52:37 -0500
> From: pfeufferm at gmail.com
> To: domenico.i8cvs at tin.it; amsat-bb at amsat.org
> Subject: [amsat-bb] Re: Arecibo
> This was my experience with a KLM 435-40CX and no preamp into a
> FT-736R. I had to energize the relay on the antenna in order to hear
> them. I assume it's RHCP normally, and LHCP when the relay is energized.
> I actually had better copy during the SSB portion than the CW, but am
> not sure why that was.
> --Mike WQ5C
> On 4/17/2010 4:31 PM, i8cvs wrote:
> > Hi Bob, W7LRD
> > What polarization have you used on your 40 el cp ? RHCP or LHCP ? I am sure
> > that with LHCP it was a very consistant signal and with RHCP nothing was
> > heard.
> > Please confirm !
> > Tanks
> > 73" de
> > i8CVS Domenico
> > ----- Original Message -----
> > From: "Bob- W7LRD"<w7lrd at comcast.net>
> > To:<amsat-bb at amsat.org>
> > Sent: Saturday, April 17, 2010 10:57 PM
> > Subject: [amsat-bb] Arecibo
> >> Very consistant signal 910/40el cp. I wish they would use dxpedition qso
> > methods for more qso/hr. This is a very finite opportunity. Had fun anyway,
> > better luck tomorrow.
> >> 73 Bob W7LRD
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