[App_rpt-users] Parallel 900MHz Links

[DougH]

Hello Bob es Bob,

I would be interested to read the information Bob. Perhaps another 
consideration might be the use of passive antennas too get round the LoS 
problem(s).

Regards,
Doug - GM7SVK


----- Original Message ----- 
From: "Bob" <kk6ecm at gmail.com>
To: "'Bob - AF6D'" <bob at af6d.com>; <app_rpt-users at ohnosec.org>
Sent: Friday, February 07, 2014 3:38 PM
Subject: Re: [App_rpt-users] Parallel 900MHz Links


> Not knowing your particular situation, I offer this experience for your
> consideration. We are using a 70cm audio link between two repeaters about 
> 20
> miles apart with about a 200m obstruction about half way in between. The
> obstruction is a saddle between the mountains that has a well defined
> ridge... pseudo knife edge? Turns out this is an optimum condition for 
> 70cm
> with an obstruction, and works quite well. I found an article on the web
> written by a couple solders who developed the rules of thumb for this
> configuration in the field to get connectivity between sites in the
> mountains. I can send it out... not sure if the list can handle an
> enclosure, and don't want to stuff it in every ones' email box if they are
> not interested.
>
>
>
> Thanks,
>
> Bob
>
> kk6ecm
>
>
>
>  _____
>
> From: app_rpt-users-bounces at ohnosec.org
> [mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Bob - AF6D
> Sent: Friday, February 07, 2014 12:02 AM
> To: app_rpt-users at ohnosec.org
> Subject: [App_rpt-users] Parallel 900MHz Links
>
>
>
> We are finally at the last phase of our build-out with three repeater
> locations with minimal overlap. We want to vote and simulcast on 2 meters. 
> I
> asked how I could get IRLP and EchoLink connected, as well as a weather
> receiver and it was suggested that I get an unvoted URI for a controller
> (like the RC-210's that we have) and use them to bring in outside sources.
> That was a great idea! But then it dawned on us that if in the event of a
> major earthquake or tornado or whatever the Internet would go down - and
> those sources too.
>
>
>
> This became even more of an important matter because we want to run a
> parallel 900MHz link system. We can't use the RC-210 approach because if 
> the
> internet goes down so would our link. The repeaters are too far apart for
> building our own Ubiquity VLAN - I think. I don't know the maximum power
> available at 900MHz and we don't have LOS between the sites.
>
>
>
> What are some ideas on getting a parallel link system in case we lose
> Allstar?
>
>
>
> Thank you for helping me learn.
>
>
>
> Bob
>
>


--------------------------------------------------------------------------------


> _______________________________________________
> App_rpt-users mailing list
> App_rpt-users at ohnosec.org
> http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
>
> To unsubscribe from this list please visit 
> http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down 
> to the bottom of the page. Enter your email address and press the 
> "Unsubscribe or edit options button"
> You do not need a password to unsubscribe, you can do it via email 
> confirmation. If you have trouble unsubscribing, please send a message to 
> the list detailing the problem.