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@bigpond.com>
Sent: Friday, April 01, 2016 2:22 PM
To: <topband@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@starpower.net
To: TopBand List <topband@contesting.com>
Subject: Re: Topband: Wind Farming
Message-ID:
<990159030.6273859.1459367974629.JavaMail.root@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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