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73,
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Steve
Lane
Sent: Tuesday, November 13, 2012 4:37 PM
To: Andreas Hofmann
Cc: David Thompson; towertalk@contesting.com
Subject: Re: [TowerTalk] RFI Issues for W7PSK
For me, it was a couple of DeWalt cordless drill batteries that I was
floating in the garage and the house alarm system battery charger. Those
chargers raised all kinds of havoc.
Steve K9SL
On Tue, Nov 13, 2012 at 2:27 PM, Andreas Hofmann <
Andreas.Hofmann@microsoft.com> wrote:
> I am not sure if you have fully ruled out your own house yet or not. But
> this may help...
>
> I ran into something similar and initially thought it was because of my
> newly installed power Smart meter. Then, I slowly turned off different
> circuits in the house (while monitoring the noise floor on the HF bands),
> and found it was somewhere in the house. Finally, it turned out it was a
> switching power supply for my cable TV modem. Replaced that with a brick,
> and all is good.
>
> Good luck,
> Andreas, KU7T
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> David Thompson
> Sent: Tuesday, November 13, 2012 12:36 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] RFI Issues for W7PSK
>
> I have had a number of RFI instances and less than 50% are power line
> related. So the question of what if they (the power company) find the
> problem is in a house or business is very possible.
>
> Here is what I have found:
> 1. Door bell buzzers.
> 2. Bad switches in my power panel.
> 3. Defective motors in fish tanks.
> 4. A bad UPS at a software company
> 1/2 mile away.
> 5. A defective motor on the AC at the same software company.
> 6. Defective electric fences.
> 7. TV sets that generate noise.
> 8. Touch on lights (160 and 80).
>
> Another problem for underground utilities is bad grounds and lightening
> strikes. The problem usually stops between 7 and 10 Mhz.
>
> Power Companies have full work loads already and at best they will have a
> CB sniffer.
>
> Private homeowners and businesses do get FCC letters just as do the Public
> Utilities. So its probably up to the ham to find the problem and ask for
> help. The FCC is usually the second level of help.
>
> Dave K4JRB
>
>
>
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