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RE: [Karlnet] Amps

To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
Subject: RE: [Karlnet] Amps
From: "Andy Henckel" <ahenckel@transaria.com>
Reply-to: Karlnet Mailing List <karlnet@WISPNotes.com>
Date: Thu, 20 May 2004 14:35:36 -0600
List-post: <mailto:karlnet@WISPNotes.com>
Indeed, although they look similar, I think the YDI amp is better quality. 

Amps are most useful when you have long cable runs.  And it should be right 
next to the antenna.  
Although 7/8" or greater heliax seems to perform as well as having the Amps 
with 600 or 400 LMR.  (probably about the same cost too)


 -----Original Message-----
From:   karlnet-bounces@WISPNotes.com [mailto:karlnet-bounces@WISPNotes.com]  
On Behalf Of Andy Thomas
Sent:   Thursday, May 20, 2004 2:12 PM
To:     Karlnet Mailing List
Subject:        Re: [Karlnet] Amps

I think the other Andy was saying that he wasn't real impressed with the
Hyperlink amps...it's a different company than YDI.
http://www.hyperlinktech.com/
http://ydi.com/

   I put the amp close to the antenna to minimize RF loss along the
transmission line.  This way I can feed the amp/antenna 50' away from the
base station running a 20mW card using LMR 900.  I actually think this is
overkill, but it's what we had.  I haven't run the numbers, but I think the
amp would still fire over that length of LMR 600.

Andy

----- Original Message ----- 
From: "Scott Wendrick" <scooter@uplogon.com>
To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
Sent: Thursday, May 20, 2004 12:40 PM
Subject: Re: [Karlnet] Amps


> Are the ydi amps hyperlinks?  Why is it better to put the amp near the
> antenna rather then near the base.  Wouldnt there be less noise if it was
> closer to the signal?
>
> Scott Wendrick
>
> ----- Original Message ----- 
> From: "Andy Henckel" <ahenckel@transaria.com>
> To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
> Sent: Thursday, May 20, 2004 12:09 PM
> Subject: RE: [Karlnet] Amps
>
>
> I agree... if you absolutely have to use amps... (would try to avoid at
all
> cost) then YDI hasn't done me wrong in 4 years.
> After using a spectrum analyzer near a Hyperlink amp, I would say that
they
> are pretty good at bleeding over into adjacent channels.
>
>  -----Original Message-----
> From: karlnet-bounces@WISPNotes.com [mailto:karlnet-bounces@WISPNotes.com]
> On Behalf Of Andy Thomas
> Sent: Thursday, May 20, 2004 10:56 AM
> To: Karlnet Mailing List
> Subject: Re: [Karlnet] Amps
>
> I'm running YDI amps at the antennas and injecting power at the base
> stations.  I did have to get Polyphasers on the antenna leads that pass DC
> through.  So far so good after about 2 years.
>
> Andy Thomas
>
> ----- Original Message ----- 
> From: "Scott Wendrick" <scooter@uplogon.com>
> To: <karlnet@WISPNotes.com>
> Sent: Thursday, May 20, 2004 9:08 AM
> Subject: [Karlnet] Amps
>
>
> > What brand are you all currently running for amps and how do they
perform.
> Also what location are you mounting the amps (after the radio or up by the
> antenna).  Thanks for the info
> >
> > Scott
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
> >
> >
> >
>
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