[TowerTalk] QRN during the rain

[Trent and Lorraine]

The QRN can be easily traced with a portable HF receiver and you can test
wooden power poles with a sledgehammer to see if it stops _ well it worked
for me one contest weekend 20 years ago :-)  


Trent Sampson 
[PO Box 1647 Toowoomba Qld 4350]  VK4TI 
 

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Kelly Johnson
Sent: Tuesday, 12 December 2006 6:30 AM
To: towertalk at contesting.com
Subject: [TowerTalk] QRN during the rain

I live near overhead HV powerlines as well as overhead MV powerlines.
The nearest ones are the MV powerlines which terminate at the corner of my
lot about 70 or 80 feet from my tower.  I get very strong noise levels,
especially on 80 and 40 meters whenever it rains.  The noise levels go back
to normal awhile (a few hours) after the rains stop.
It sometimes affects higher frequency bands too, but is most noticeable on
80 and 40.  My noise levels are usually reasonable low on 40 (like S1 or
less in a 500Hz bandwidth), but seem quite high (S7 or S8 on average) on 80
meters.  My noise levels are usually reaonsably low on the higher bands as
well.  The HV lines seem surprisingly quiet.  The noise seems to come from
the MV lines.  What causes this?
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