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



They rate the dish gain before any devices.

John / NS1Z wrote:

> 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
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

--
Bill
WA2TQI


----
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