Re: [CQ-Contest] Need confidence....

[Gary K9GS <garyk9gs@wi.rr.com>]

Hi Ray,

My group did this once for FD.  A few things:

1)  You MUST use bandpass filters.

2)  Make sure that you use radios with good phase noise performance.  
The year we did this in FD we used three 100W radios through a 
tri-plexer to a tribander.  the radios did not have good phase noise 
characteristics.  On 15 and especially 10M, the radios were unusable on 
receive.


On 10/4/2016 8:03 PM, Ray Day wrote:
> Hi all,
>
>   
>
> Ray, N6HE here. My radio club plans on going to activate Santa Catalina
> Island (IOTA NA066) again in February 2017. In the past we've had problems
> with 2 radios simultaneously on 20/17, 17/15, 20/15, etc. We don't have the
> room to be completely "tip-to-tip" with our 2 hexes, nor can we get much
> physical separation between the 2 antennas for the 2 rigs. So - problems.
>
>   
>
> Now I'm thinking that the "Triplexer + Bandpass Filters" idea with only one
> hex antenna might be the answer. I hear reports that this approach works
> well, but I'm totally chicken to try 2 of my radios transmitting into one
> antenna (or more accurately, 1 transmitting and 1 receiving) at the same
> time. Jeez - 100W that close to a receiver's input???? Nice theory!
>
>   
>
> So my question to the group is "Have you had personal experience with this
> setup AND does it work as advertised?" I see triplexers from Dunestar and
> Low Band Systems (with the associated bandpass filters) - we'd be on 2 of
> 20-17-15-12-10M at the same time.
>
>   
>
> Your thoughts?
>
>   
>
> Thanks in advance,
>
> Ray N6HE
>
>   
>
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--
73,

Gary K9GS

Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032   http://www.cwops.org

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