Cable loss works in both directions. Yes, the amps have a receiver preamp
built in to make up for cable loss going back down to the radio, however, it
is better to NOT lose any more signal than necessary than to rely on an amp
to boost it back up. You NEVER make up for the lost signal and you add more
noise. RG 58 is especially lossy at 2.4gig and a very poor choice. LMR400
is probably the minimum cable size for a fairly long run of cable and
amplifiers. I prefer to use LDF4-50 1/2" Heliax for long runs of 50 or
more feet. It has a solid copper outer conductor and has a proven track
record in the radio industry and cannot be beat. Its larger brothers LDF5-50
7/8" , LDF6-50 1 1/4", LDF7-50 1 5/8" heliax and larger are common in the
two way radio and broadcast industry for a very good reason, they last. A
properly installed Heliax cable run should last 10-15 years and longer with
no maintenance.
Steve
----- Original Message -----
From: "wesley allison" <scgn@pipeline.com>
To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
Sent: Sunday, July 13, 2003 9:25 PM
Subject: Re: [Karlnet] quick antenna question
Please correct me if I am wrong because I have been learning so much so fast
but the Hyperlink's Outdoor amplifiers with Automatic Gain Control (AGC)
automatically adjust to provide a constant output power regardless of cable
length. They are remote-powered and mast-mounted near the antenna. Now let
me preface this by "That is what they said" so I was under the understanding
that I could run some, lets say RG-58 and this amp would take care of my
cable loss. Please advise
Thanks
Wes
----- Original Message -----
From: "Nate McLain" <nate@ctrail.net>
To: "wesley allison" <scgn@pipeline.com>; "Karlnet Mailing List"
<karlnet@WISPNotes.com>
Sent: Sunday, July 13, 2003 9:12 PM
Subject: RE: [Karlnet] quick antenna question
> CABLE LOSS my friend......
> Here is a link so you can see the amount of cable loss for different
cable.
> http://www.timesmicrowave.com/cgi-bin/calculate.pl
>
> Nate
>
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of wesley allison
> Sent: Sunday, July 13, 2003 8:57 PM
> To: karlnet@WISPNotes.com
> Subject: [Karlnet] quick antenna question
>
>
> I have a 2.4 GHz antenna that uses LMR400 cable, standard stuff, but can I
> use something else and what are the advantage and disadvantage. I was
> looking at some old thick net coax cable and I was wondering LMR400 is
coax
> cable in a larger scale, so why can't I same a little money on long runs
and
> use a smaller coax cable for my antenna's?
>
> Wes
> _______________________________________________
> Karlnet mailing list
> Karlnet@WISPNotes.com
> http://lists.wispnotes.com/mailman/listinfo/karlnet
>
>
>
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