[CRTech] Christian Radio Tech [MSG 01846]
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Dan Smith
Chief Engineer & IT Guy
Clear Channel-KELA-KMNT Radio
1635 S. Gold St., Centralia, WA 98531
voice 360-736-3321, fax 206-350-0326=20
Warning: This email is for topical use only.  Do not ingest.

-----Original Message-----
From: Mark Croom [mailto:markc@kjly.com]
Sent: Friday, May 23, 2003 8:45 AM
To: CRTech
Subject: Re: [CRTech] Networking

I suspect that anybody needing to do a 100 mile STL would probably use
multiple sites with shorter towers rather than a simple send-receive =
at that kind of height. Here in the 48 you probably couldn't license a =
ICR with antennas at 600 ft anyway. The interference potential would be
horrendous. Maybe in Alaska, but I dunno about that.

I agree it seems that satellite might just be the best bet for him, but
there's more than one way to "skin the cat" on that STL/ICR approach. =
still be pricey. We estimate about $10k per site plus leasing costs when
we're doing a microwave link around here. We're talking about antennas =
water towers, grain elevators, etc. If we were using Mosely equipment =
cost estimate probably have to be higher by quite a bit.

Mark Croom
Blue Earth, MN

----- Original Message -----
From: "Jerry Mathis" <thebeaver32@hotmail.com>
To: <crtech@crtech.org>
Sent: Thursday, May 22, 2003 5:34 PM
Subject: Re: [CRTech] Networking

> I hate to burst your bubble, but some Engineering calculations =
> the requirements for a 100 mile STL (much less 200) are most likely =
> than you want to spend.
> A 100-mile STL path will require your antennas to be about 650 feet =
> ground level at each end. This is assuming you have flat terrain, =
which in
> the Far North you probably do not. The height of the towers is to take
> account the Earth's curvature, and the required Fresnel zone clearance =
> your signal. If you happen to have a mountain range in the middle of =
> path, your antennas will have to be that much higher.

etc etc

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