[TowerTalk] QRN during the rain

wa3afs at inav.net wa3afs at inav.net
Tue Dec 12 06:51:56 EST 2006


DO NOT HIT A POWER POLE WITH A SLEDGE HAMMER!!!!

There could be lose hardware which can fall on you!  Potentally a very 
dangerous action.

Suggest you go to the RFI reflector and get assistance from the experts.

73 and be safe
   Bruce, WA3AFS






On 12 Dec 2006 at 17:51, Trent and Lorraine wrote:

> 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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