Repeater Power output being a function of RSSI...Have another think on this one
... What about all the other mobiles or handhelds that could be in fringe or
poor coverage areas, what will happen to their repeater reception if suddenly
the repeater power is suddenly dropped at the expense of a hi
Allen,
Just for fun our club set-up a 250watt repeater w/o cans. We installed the
transmit antenna on the roof top of the building. One floor down (its a tiered
roof) we installed the receive antenna. We positioned the two antenna so that
they were physically separated by the structure. The
Towards reducing power consumption:
Use the sleep mode on the processor.
Set RF output power as a function of RSSI.
Include multi-chemistry battery management.
Include solar panel management.
Include charge termination output; would drive a relay which would
shut down a small generator which
Of vhsproducts
Sent: Monday, August 03, 2009 10:09 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Portable repeater
I am in the design stages for a portable VHF (2 meter ham) repeater, and
thought I would solicit the views of the group for desired features. In
broad stroke
From: vhsproducts
To: Repeater-Builder@yahoogroups.com
Sent: Monday, August 03, 2009 11:09 PM
Subject: [Repeater-Builder] Portable repeater
I am in the design stages for a portable VHF (2 meter ham) repeater, and
thought I would solicit the views of the group for desired features
-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Portable repeater
Use a solar panel to keep a charge on the battery. if the repeater is only 5
watts then a small solar panel will do the trick easily.
you can get a 120 watt panel or an array of smaller panels for portability
which will
if you go with 2 ant you will have a lot of coax to lug around !!
if you could go to UHF the duplexer are smaller even 220 mhz !
unless you have a non Ham freq than you could run a mobile duplexer on
VHF and have 2 of them and swap jumper cables in the box
Good luck !
Rick
On Tue, Aug 4, 20
Use a solar panel to keep a charge on the battery. if the repeater is only 5
watts then a small solar panel will do the trick easily.
you can get a 120 watt panel or an array of smaller panels for portability
which will charge the battery plus run the repeater all day and allow the
system to op
Packaging, ease of use and battery life are way up there on the list. Without
addressing these issues, It's just another portable repeater
Have a look at this. This is what we made for Emergency services
http://www.signals.net.nz/special_offers/
Either VHF or UHF.
Regards
Gareth Bennett
k at
http://www.rfi.com.au/downloads/wireless/multicoupling/duplexer132_174.pdf
Please post some pics when you are done and maybe some along the way.
Thanks
Greg
VK2VGM
--- On Mon, 8/3/09, vhsproducts wrote:
From: vhsproducts
Subject: [Repeater-Builder] Portable repeater
To: Repeater-Builder@yahoo
I am in the design stages for a portable VHF (2 meter ham) repeater, and
thought I would solicit the views of the group for desired features. In broad
strokes, we plan on a computer programmable unit, capable of one or two field
selectable operation modes. CTCSS only, no COS or DTS. This is prim
Hello All,
I am looking for a good antenna for a portable 440 repeater.
73's,
Chris Colquhoun
Aiea, Hi
NH7QH
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To visit your group on the web, go to:http://groups.yahoo.com/group/Repea
At 1/2/2005 09:03 PM, you wrote:
>Kevin,
>
>Yes, it is asymmetrical. Each of the three high-pass resonators has two
>black plastic plugs near the connector end, while the low-pass
>resonators each have one plastic plug. A Celwave engineer told me that
>the 5085-1 is manufactured to order, and t
Kevin,
Yes, it is asymmetrical. Each of the three high-pass resonators has two
black plastic plugs near the connector end, while the low-pass
resonators each have one plastic plug. A Celwave engineer told me that
the 5085-1 is manufactured to order, and that the coupling loops are
factory-adjus
Eric Lemmon wrote:
>It comprises six helical resonators in a notch-only configuration. Its
>insertion loss at RX is 1.1 dB, and at TX is 1.4 dB. The notch depth at RX is
>92.5 dB and at TX is 79.4 dB. These are very good numbers, better than what
>is needed for
>zero desense in this applica
I recently built a portable 2m repeater that is about the size of a
bowling bag and weighs about the same. It is built into an SKB carrying
case that is rugged, dripproof, and good-looking. The secret of getting
a full-duplex radio and the duplexer into a box measuring about one
cubic foot in vo
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