Fw: [CRAPRS] Call for help

[Ron Tonneson]

The antenna is 21.5 feet long and we want to mount it to the vertical tube so most of it should 
be be above.  The OD of the antenna mast is 2 inches.  Here is the antenna: 
<http://www.andrew.com/products/antennas/bsa/DB264-A.aspx>  I have not asked about drilling into 
the structure, I was thinking a clamp on of some kind.  I am told that the horn antennas are 
going to be removed, the dish will stay.  If I understood correctly it is part of an LPFM 
station that is going in there this week.

I have not been in the Morse tower so not sure were power is available.  I got the impression in 
my conversations with Rob that we could put it near the top.  With any luck we can put it in the 
room labeled landing area, no lower than the 9th floor for sure.  I may make a reconnaissance 
run over there in the next couple days.

There is a metal screen over the filter.

Ron

bsmccoy at rockwellcollins.com wrote:
> Posting from the CRAPRS mailing list:
> 
> 
> ------------------------------------------------------------------------
> 
> 
> What does the antenna look like, i.e. what do we have to connect to when 
> fashioning a mount?
> Do you want to be above the dishes, so you have clear RF view in all 
> directions (looked like a nice vertical tube sticking up high centered 
> on one of the feedpoints - Or do you want to be nestled below the 
> lightning attach point?   Can we drill into existing structure, or do we 
> need to clamp to the existing steel?  
> Looks like the biggest challenge will be carrying the 12' step ladder up 
> the stairs to get to the coax entry point.  How close is the nearest AC 
> outlet to the antenna feed point?  Are the radios to be located near the 
> top of the tower, or at ground level?
> 
> Nice looking boxes by the way.  I might suggest a piece of hardware 
> cloth over the filter, as learned in the radio station experience, the 
> mice like to eat through the filter and nest next to the warm equipment. 
>  They also aren't very discriminating about what they eat and where they 
> go to the bathroom....
> 
> Bryan
> ----- Forwarded by Bryan S Mc Coy/CedarRapids/RockwellCollins on 
> 05/21/2007 07:41 AM -----
> *Ron Tonneson <ron.tonneson at gmail.com>*
> Sent by: craprs-bounces+bsmccoy=rockwellcollins.com at rf.org
> 
> 05/19/2007 07:44 PM
> 
> 	
> To
> 	CRAPRS <craprs at rf.org>
> cc
> 	
> Subject
> 	[CRAPRS] Call for help
> 
> 
> 	
> 
> 
> 
> 
> 
> Posting from the CRAPRS mailing list:
> Thanks to the generosity of Heartland Towers, AKA Rob Nall WV0S, we have 
> the opportunity to
> install APRS digipeaters on a couple towers in the area.  These towers 
> are near Morse and
> Maclcom.  Both sites will provide antenna locations that are about 300 
> feet AGL.  These should
> greatly improve the coverage along I80 and to some extent along US30.
> 
> I have all the equipment needed except for a couple of Polyphasers which 
> are on order.  Each
> digipeater package will have a GE Phoenix radio, 25 amp Samlex power 
> supply, MFJ TNC, monitor
> box and cooling fan.  Here are photos of the digipeater packages:
> <http://i156.photobucket.com/albums/t17/k0qvf/Digi_box_inside.jpg>
> <http://i156.photobucket.com/albums/t17/k0qvf/Digi_box_outside.jpg>
> 
> I will need some help with the installation at the Morse tower.  Here is 
> a photo of the tower:
> <http://i156.photobucket.com/albums/t17/k0qvf/Morse_Tower_1.jpg>
> 
> I have not been to the Morse tower yet but here is the view down looking 
> over the edge from the
> top of the Homestead tower:
> <http://i156.photobucket.com/albums/t17/k0qvf/Homesteadlookingdown.jpg>
> 
> We will need to drill a hole in one of the waveguide blanks shown in 
> this picture:
> <http://i156.photobucket.com/albums/t17/k0qvf/Coax_Entry_Into_Building.jpg>
> 
> We will then need to route the co-ax from the antenna to the digipeater 
> package similar to the
> waveguide routing shown here:
> <http://i156.photobucket.com/albums/t17/k0qvf/Inside_Coax_Runs_2.jpg>
> 
> On the first visit there we will install the digipeater with a temporary 
> j-pole antenna mounted
> to the guard rail.  We will also take measurements to design and 
> fabricate a mount such that we
> can mount a DB264 to the round pipe in the middle of this photo:
> <http://i156.photobucket.com/albums/t17/k0qvf/Top_Dish_1.jpg>
> 
> The install at the Malcom tower will be quite a bit easier as I am told 
> there is an antenna near
> the top that we can use.  Just have to plug in the digipeater package.
> 
> I am thinking that it would be nice to have two or three helpers at the 
> Morse site.  There is a
> staircase inside tower with lots of steps.  Will also be looking for 
> ideas/help fabricating the
> DB264 mount.
> 
> Thanks,
> 
> Ron - K0QVF
> 846-2597
> ron.tonneson at gmail.com
> 
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