[amsat-bb] Re: New Preamp
kl7uw at acsalaska.net
Mon Sep 17 22:45:26 PDT 2007
I've been preaching preamps from the AO-10 years. WE especially had
a "hard sell" with folks trying to get on AO-40 mode-S. Now there
are a lot of wiser folks. ...and remember it belongs as close to
your antenna as possible...loss ahead of the preamp adds directly to
I copied AO-52 telemetry using a 19-inch whip on a small and a UHF
preamp (mgf-1402) to mixW2 sw.
At 08:25 PM 9/17/2007, Jim Jerzycke wrote:
>Welcome to the wonderful world of mast-mounted
>preamps! 90% of the people who get involved with
>satellites (INCLUDING myself) think they don't *need*
>a preamp. After doing all you can (better antenna,
>lower loss feedline, etc) to get your receive setup
>maxed out, you finally decide to "just try one; I can
>always sell it on eBay", and are usually amazed at the
>improvement it gives you.
>The _first_ thing I suggest to newcomers is to buy a
>good preamp. Sadly, most are like I was, and stumble
>around for weeks or months worrying about other things
>before finally buying one.
>Congrats, and enjoy your preamp!
>73, Jim KQ6EA
>--- Bob Stewart <bob at evoria.net> wrote:
> > My new 70cm preamp came in today! I got the ARR
> > mast-mount
> > version. I wasn't sure I'd hear any improvement,
> > but it's very
> > noticeable. I was able to hear QSOs on SO-50 down
> > to about
> > 15 degrees tonight, whereas before, 20 was really
> > stretching.
> > I am using a turnstile in the attic with reflector
> > elements at about
> > 9.25" below the radiators. I can see that I'm
> > eventually going to
> > have to build more robust versions of my turnstiles
> > and put them
> > on top of the roof.
> > My power supply is a bit odd, so maybe someone will
> > get a kick
> > out of it. I have an Atlas 210X left over from
> > years ago, and
> > the PSU will power either of my bricks. The 210X
> > slides into the
> > PSU which an SO-239 on the back of it. In order to
> > get the power
> > up to the preamp, I added a fused switchbox and sent
> > the power
> > through that SO-239. This allowed me to just screw
> > on a Radio
> > Shack 50 ft length of RG-58 without having to cobble
> > up a
> > connector on the rig end.
> > Bob - AE6RV
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Ed - KL7UW
BP40IQ 50-MHz - 10-GHz www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
DUBUS Magazine USA Rep dubususa at hotmail.com
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