[App_rpt-users] Parallel 900MHz Links

[Brett Friermood]

Myself and probably many others would too. Might I suggest getting it
to the Repeater Builder guys? They are usually very happy to get
information such as that and can get it on their site for all to see.

Brett KQ9N


On Fri, Feb 7, 2014 at 10:03 AM, DougH <specialq.que at ntlworld.com> wrote:
> 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
>>
>>
>
>
> --------------------------------------------------------------------------------
>
>
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