Topband: Wind Farming

[Kees Nijdam]

ZL6QH is the only Long Path 160m qso I ever made.
Pity it had to switch off!

PE5T

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From: "Brian Miller" <bdm556 at bigpond.com>
Sent: Friday, April 01, 2016 2:22 PM
To: <topband at contesting.com>
Subject: Re: Topband: Wind Farming

> Thanks Frank
>
> I was previously the chair of the Quartz Hill User Group responsible for 
> the ZL6QH station.
>
> We undertook measurements of the noise from the wind farm at the ZL6QH 
> site. A report on our measurements is published 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 a HF contest station would have be located 
> at least several km from a wind farm using these turbines to reduce the 
> interference to an acceptable level on the low frequency bands.
>
> But not all turbines are this noisy. We also conducted some HF radio 
> frequency noise measurements at the Meridian Energy Te Apiti wind farm 
> (near Palmerston North) in October 2005 but found no evidence of any 
> significant noise being radiated by the turbines, even at locations within 
> 100 metres of the nearest turbines. Unlike the turbines at Quartz Hill, 
> the Te Apiti turbines were a fixed speed design and did not use a separate 
> power converter unit
>
> 73
>
> Brian VK3MI ZL1AZE
>
> ------------------------------
>
> Message: 7
> Date: Wed, 30 Mar 2016 15:59:34 -0400 (EDT)
> From: donovanf at starpower.net
> To: TopBand List <topband at contesting.com>
> Subject: Re: Topband: Wind Farming
> Message-ID:
> <990159030.6273859.1459367974629.JavaMail.root at starpower.net>
> Content-Type: text/plain; charset=utf-8
>
> The Quartz Hill Contesters -- once very well known as ZL6QH -- 
> were forced to shut down their spectacular contesting location
> by the RFI from a wind farm installed in the same location as
> their contest station.
>
>
> http://zl6qh.com/logs/Quartz%20Hill%20Pictures%20-%20%20March%202010.pdf
>
>
> 73
> Frank
> W3LPL
>
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