For those of you that have BrailleNotes, I found out that my
voicenote power supply can create interference on my HF radio.
It doesn't always do it which made it hard to figure out that it
was from the BN power supply. So if you have a braille or
voicenote in proximity of your HF rig, try umplugging the power
to it if you are hearing noise. Jim WA6EKS
> ----- Original Message -----
>From: Lou Kolb <[log in to unmask]
>To: [log in to unmask]
>Date sent: Wed, 6 Aug 2014 08:33:33 -0400
>Subject: Re: A Noise Problem I Am Having
>john,
>These days, it could be anything, a plasma TV, for instance. But
what you
>describe doesn't sound like that. Switching power supplies are
known to
>shift and sweep frequencies as you describe. i had a 20 over 9
noise level
>that seem to show up from nowhere one day and was on all the
time. It turned
>out that the wall wart that powered my wife's sling box was the
culprit. it
>had been plugged in for years with no problem but one day it just
went bad.
>It took me a week of flipping breakers and unplugging items to
track it
>down. Good luck and 73. Lou WA3MIX
>Lou Kolb
>Voice-over Artist:
>Radio/TV Ads, Video narrations
>Messages On-hold:
>www.loukolb.com
>----- Original Message -----
>From: "John Glass" <[log in to unmask]
>To: <[log in to unmask]
>Sent: Wednesday, August 06, 2014 1:23 AM
>Subject: A Noise Problem I Am Having
>> Hi,
>> I am trying to track down an intermittent noise problem, and any
>> suggestions will be greatly appreciated.
>> I live in a condominium, and have an upstairs neighbor.
>> The intermittent noise covers the am broadcast band up through
the 440 ham
>> band.
>> When listening to a repeater, I can hear the noise start out at
a low
>> level, then it gets very strong and will take the local repeater
>> completely out of my receiver for about five seconds.
>> The noise seems to sweep in frequency.
>> Unfortunately, it is very random, sometimes I won't hear it for
several
>> hours, and at other times, It is present every few minutes.
>> I have turned my main ac circuit breaker off with no effect, so
I think
>> the source is coming from my neighbor's condo.
>> Any ideas of what might be causing this?
>> John
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