[CQ-Contest] Multiband Antenna separation for Multiplier station...

[Douglas Ruz / CO8DM]

Hi Mike,

Thanks for your reply.

Yes, in Multi-Two stations you have 2 Running stations but you can install 
few Multipliers stations only to work Multipliers...sometimes you find 
Multipliers in one of the bands you have a Running station.

73

Doug, CO8DM
----- Original Message ----- 
From: "W0MU Mike Fatchett" <w0mu at w0mu.com>
To: <cq-contest at contesting.com>
Sent: Friday, October 07, 2016 7:42 PM
Subject: Re: [CQ-Contest] Multiband Antenna separation for Multiplier 
station...


> There is no simple answer to this question.  How much power.  Where are 
> the antennas pointing, etc.
>
> You are asking for trouble being on the same band.  You should have 
> lockouts to make sure you both cannot be transmitting on the same band at 
> the same time.  I would also want to take the other radio receive to 
> ground while the other radio was transmitting.  You should have bandpass 
> filters on both all radios in the contest station.  That will help 
> everyone.
>
> The lower the freq the more separation you will need.  I don't know that 
> you can really get enough separation to guarantee a damage free operation.
>
> CQ WW requires:
>
> *1. Station location:* The area in which all the transmitters, receivers 
> and antennas are located.  All transmitters and receivers must be within a 
> single 500-meter diameter circle. Antennas must be physically connected by 
> RF transmission lines to the transmitters and receivers.
>
> So 500M is my answer :).
>
> I have no idea why you would want to use your 2nd transmitter on the same 
> band as the 1st.
>
> *2. Two Transmitters (MULTI-TWO):* A maximum of two transmitted signals on 
> two different bands may be used at any time. The log must indicate which 
> transmitter made each QSO. Each transmitter may make a maximum of 8 band 
> changes in any clock hour (00 through 59 minutes). Total output power must 
> not exceed *1500 watts* on any band at any time.
>
>
>>
>>
>> Hi,
>>
>>
>> We are planning M2 operation for CQWW SSB contest.
>>
>>
>> We would like install a Multiband antenna for the Multiplier station...to
>> avoid
>>
>> damage receivers front end, what is the minimum separation between Main
>>
>> antennas and a Multiband Mult antenna???
>>
>>
>> The worse case is trying work a NEW MULT in the same band we are RUNNING.
>>
>>
>> Any idea?
>>
>>
>> Thanks,
>>
>>
>> Doug, CO8DM
>>
>> T48K Team
>>
>>
>> Mike, Coreen & Corey
>>
>> Keswick Ridge, NB
>>
>>
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>
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