Re: [Repeater-Builder] 900 Mcs Stuff

3 Aug 2004 12:18:22 -0000

 

Joe wrote:

 It's a good antenna, but it is long, heavy, and rather expensive. When you are shopping for a 900Mhz antenna, you really need to look at what you want the antenna to do.  The particular antenna that you picked out would play superbly to the horizon, but would overshoot the area just below it if you installed it on a very high site.  Be aware that 900Mhz allows you to get some really fantastic gain, but there is a tradeoff.   You may want an antenna with less gain, downtilt, and possibly null fill. Joe

"Mr. Edgar McKinney" <[EMAIL PROTECTED]> wrote:

Since I'mbeing convenced that 900 is better..... How about this antenna for the repeater???
 

http://www.celwave.com/RFSGlobal/datasheet.asp?PN=10017%2D8&FAM=BaseStationAntennas

I delt with Celwave in the past on commercial sites as well gov. They seem to be pretty good and stand by their equipment.

Opinions?

Ed

At What distance will the over shootin occore?

I was thinking of about 20 miles or so for linking.

To answer your question about what is the antenna to do and what I want in it....

To do) T be able to see a long off and be sturdy enough for weather dammages.

What I want) To have non-fading signal path between the linked repeaters and the power handling ability. At 900 Mcs in order to cover 20 - 40 miles I need at least 200 watts.

I could use a series of panel antennas to create an omni patters. They have a down-tild ability.

The location is at 3200' ASL and HATT is about 1000 at 10 miles but at 20 miles the HATT is about 300' due to Peters, Pots, East River, Gualley, and Guyandott mountains. Measured on a 38 spoke 5 mile axis points.

Thanks againfor the sugestions and help.

Ed






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