Topband: Low band noise

[Bruce]

Hi Brian,

Thank You, appreciate your information and help. There is one message on the 
reflector now. Will forward, but you may have found it already.

73,
All the best,

Bruce-K1FZ


----- Original Message ----- 
From: "Brian Miller" <brianmiller at xtra.co.nz>
To: <topband at contesting.com>
Sent: Saturday, February 22, 2014 5:50 PM
Subject: Re: Topband: Low band noise


> Hi Bruce
>
> Very happy to answer questions that top band DXers may have about our 
> experience at ZL6QH.
>
> Please note that not all wind farm installations are noisy - it depends on 
> the type of turbine technology that is deployed.
>
> 73, Brian VK3MI ZL1AZE
>
> -----Original Message----- 
> From: Bruce
> Sent: Saturday, February 22, 2014 12:45 PM
> To: Brian Miller ; topband at contesting.com
> Subject: Re: Topband: Low band noise
>
>
> Hi Brian,
>
> Thank you for your input and sorry to find that the windmill farm noise
> caused ZL6QH to close down.
>
> It will become evident that each country will need enforce RF noise limits
> on windmills, or start  rule making if none exist.
>
> In the USA complaints to the ARRL should bring guidance in this matter.
>
> Some of the low band reflector DXers may wish to ask questions, if that is
> all right with you.
>
> Thanks again,
> 73
> Bruce-K1FZ
>
>
> ----- Original Message ----- 
> From: "Brian Miller" <brianmiller at xtra.co.nz>
> To: <topband at contesting.com>
> Sent: Friday, February 21, 2014 5:46 PM
> Subject: Re: Topband: Low band noise
>
>
>> Hi Bruce et al
>>
>> Radiated noise from a new wind farm eventually forced us to close down 
>> and exit the ZL6QH contest station. A detailed report on the noise levels 
>> is available at 
>> http://www.zl6qh.com/rf-noise-measurements-quartz-hill-2009-v3.pdf .
>>
>> The ZL6QH wind farm used Siemens 2.3 MW variable speed turbines. We 
>> believe the noise was generated by the water cooled electronic power 
>> converter technology that was used to convert the variable output of each 
>> turbine to the fixed voltage and frequency of the national grid.
>>
>> Our observations suggested that an HF contest station would have be 
>> located at least several km from the wind farm to reduce the interference 
>> to an acceptable level on the low frequency bands.
>>
>> 73
>>
>> Brian VK3MI ZL1AZE
>> ----------------------------------------------------------------------
>
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