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Re: N-connector loss (or things that make you go hmmmmm???)



You misunderstood my question: When we buy a dish, such as the Andrew, it is
specified as 24 dB gain. Of course we all know there is loss in cables, no
matter what the length. My question is whether the gain of 24 dB is at the
dipole feed point or after the losses introduced by the cable which comes as
in intregal part of that dish ....

It's obvious I don't have enough to do.....

----- Original Message -----
From: Edward R. Cole <al7eb@ptialaska.net>
To: <amsat-bb@AMSAT.Org>
Sent: Tuesday, May 22, 2001 12:30 AM
Subject: Re: [amsat-bb] N-connector loss (or things that make you go
hmmmmm???)


> 1>From: "John / NS1Z" <ns1z@arrl.net>
> >With all this talk about connector loss, etc. I wonder: is the gain
> >specified for these BBQ dishes at the end of the pigtail or at the feed
> >point of the dish? The feed and pigtail are supplied as one unit, which
is
> >coupled to the dish - the pigtail is not added by the user.....
>
> John it is simply what ever the loss is for that length of coax.
>
> For the rest of you out there:
> The concern over connector loss is just ridiculous in my opinion!  Also
not
> necessary to eliminate the connector at the helix.  A double Male N
adapter
> is fine.  If buying a DEM preamp why not ask Steve if he can substitute a
> Male-N panel connector.  At the least just drill the four mounting holes
in
> the DEM enclosure and mount your own Male connector...this is not rocket
> science :-)
>
> If your NF and dish size is so small that 0.1 dB makes a difference you
> need to fix the NF and/or dish!  This is a "get a bigger hammer"  deal.
> Now if you were building a moonbounce system it might be extremely
> important.  Just do the reasonable things and it will work!
>
> Stacking two 18 inch dishes is another idea that is easier to just move up
> to a bigger dish.  Increasing to a 24 inch dish will result in  the gain
as
> two dishes stacked, without the headache of phasing lines and signal
> dividers, etc.
>
> Ed
>
> Ed
>
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