[FADCA] Network Status

[bud thompson]

----- Original Message ----- 
From: "Chuck Hast" <wchast at gmail.com>
To: "FADCA" <fadca at mailman.qth.net>
Sent: Saturday, February 26, 2005 22:32
Subject: [FADCA] Network Status


> Was looking at the network it appears that SRQ is gone. I do not see it in
> the heard logs, I do see Arcadia and depending on conditions we can
> link to it during certain times of the day. Guess there is no path east 
> from
> Arcadia.
>
> We have to get paths out of Tampa. We could use the internet link I
> have to the Linux switch but would prefer that we try to get a path back
> up across the state again.
>
>
> -- 
> Chuck Hast

 * * * * * *
More on network status and cross-state link in Central Florida -

Dan KA0OXH is working on  the Clermont Switch - once it is on line we will 
have a UHF 9.6kb link to Orlando east (certainly by the time we move the 
Orlando switch which could happen by April).  By that time links from 
Orlando through Deland and DAB will go to JAX though some may still be 1200b 
north of DAB.

With the Orlando switch moved, we'll have a UHF 9.6kb link to Melbourne.  A 
tad far at 51 miles, but it should work most of the time.

The Clermont Switch has UHF beam(s) for additional links westward/southward- 
wherever the next link will be.  I think the last time we had a thread 
discussion the most likely next place was the Bartow airport.  My Street 
Atlas Network Map shows a 42.9 mile path seven digress off due N/S.  The 
path from Bartow to KC5QCN FPAC in Tampa is  43.8 miles three degrees off 
due E/W.  KC5QCN is 45 miles due North of Sarasota (SRQ.)  The Bartow site 
would provide a 2M LAN covering Lakeland, Lake Whales, and about 80 Percent 
of Polk  county - clear to the southern county line.

Using 150 ft agl antenna height, 60w output radios, 10 dB gain antenna, VSWR 
1.2:1, 0.5dB feed line loss, and 1.0 uv receiver sensitivity here are the 
parameters for  40 and 45 mile paths at 446 MHz:

Distance                 40 m         45 m
Path Loss            -121.6dB    -122.6 dB
Fade Margin         12.7dB         9.0 dB
Radio Horizon               34.6 m
Est. Useable Range        60.2  m

At 200 ft agl and 45 mile spacing
Fade Margin is 14.1 dB
Radio Horizon is  40 miles
Est. Useable Range is 70.9 miles

Adjacent LANS are tangential at switch spacing (backbone paths) of 40 miles. 
(Arbitrary LAN coverage of 20 miles radius.)

A new opportunity in N. Sumter County on a 150 ft water tower may be 
considered.  This area is highly populated and there is sufficient community 
support for establishing digis, switches, etc.  A LAN at the water tower 
would provide great, but somewhat overlapping coverage in N. Lake and N. 
Sumter counties.

Distances to existing network switches are:

Ocala 22.7 miles
Clermont 26.5 miles
Citrus Springs 29 miles

and to where we used to have a switch that could then make Tampa

Brooksville 32.3 miles.

Brooksville to KC5QCN is 40.6 miles.

Just stuff for thought.

bud