If you are installing a D*Star repeater stack (2m 440cm modules) can you
use a single dual band antenna for both modules or do you need separate
antennas for every module in the stack?
star_digital@yahoogroups.com [mailto:dstar_digi...@yahoogroups.com]
On Behalf Of Skier
Sent: Tuesday, April 20, 2010 9:58 AM
To: dstar_digital@yahoogroups.com
Subject: [DSTAR_DIGITAL] Repeater stack
If you are installing a D*Star repeater stack (2m 440cm modules) can you
use a single dual band
> If you are installing a D*Star repeater stack (2m 440cm modules) can you
> use a single dual band antenna for both modules or do you need separate
> antennas for every module in the stack?
>
That somewhat depends on your preferences. If you are seeking
decent performance then I would sugges
__
From: Daniel G. Thompson
To: dstar_digital@yahoogroups.com
Sent: Tue, April 20, 2010 1:53:32 PM
Subject: Re: [DSTAR_DIGITAL] Repeater stack
> If you are installing a D*Star repeater stack (2m 440cm modules) can you
> use a single dual band antenna for both modu
When we initially installed the K1XC Repeater
Stack, 2M, 70CM and 23CM modules I tried a Comet
Triband antenna and triplexer. It was a disaster
with all kinds of interactions and de
sense.When we changed out the system to 4
separate antennas (2 antennas for 1.2 Voice and
data) most of th
Bob,
All good advice, however I would like to add that there
are a number of duplexers out there that do both pass
and reject such as TX/RX and Wacom (both the same
company now I believe) and there are some other ones
as well. I like the TX/RX vari-notch design where all
cans in the duplexe
Daniel
It is true that The band pass/band reject do offer some protection it
is not as great as many believe. See
http://www.anglelinear.com/repeaters/repeaters.html
for a description of the limited filtering of most Cavity type
Duplexers. We have duplexers from TX/RX and still needed addi
At 12:34 AM 4/21/2010, you wrote:
>what is the lightning like in your area?
>If it is anything like it is here in Florida... go with a commercial grade
>antenna... otherwise your putting up a toothpick maker
If on a site where any weather extremes are possible - wind, snow,
ice, lightning,
Bob,
Yes, you are right. Many people have found that the D-Star
systems need more isolation than a similar FM system especially
the UHF units. There has been much discussion about that. I was
only trying to add that the pass/reject type filters do offer far
more protection from things outside of
On Apr 20, 2010, at 5:43 PM, Daniel G. Thompson wrote:
> Bob is definately correct that the typical 4 can setup used
> on the average FM repeater will cause you nothing but
> headaches, and that includes the ultra nice TX/RX stuff.
> You either have to go with a 6 can setup using pass/reject
> o
Another tip from the UK, is to paint the antenna(s) with Marine varnish
several times, this prolongs their durability and certainly stops any rain
or otherwise penetrating the fiberglass tube(s) over time. Might look ugly,
but an ugly working antenna is better than a non working 'clean' one!
7
You folks in the UK do it up right. I paint all of my antennas. I lightly sand
the fiberglass and paint with water based outdoor house paint. A sky blue color
or grey helps camouflage the antenna. Paint tends to last longer than a clear
varnish coating. If you want to go first class, use marine
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