one thing i can think of that can create what seems like a
higher background like noise and is often broad/spread
spectrum...
is elevator motor controllers, often pwm devices, naturally
things besides elevators that have motors or even just pwm
devices are notorious for rf pollution
best of luck
On Feb 19, 2010, at 12:15 PM, Eric - VE3GSI wrote:
> Hydro Meter?
> Do you have one of the new digital hydro meters that track off peak
> hours?
>
> Eric - VE3GSI
>
>
>
>> -----Original Message-----
>> From: rfi-bounces@contesting.com [mailto:rfi-
>> bounces@contesting.com] On
>> Behalf Of Joe
>> Sent: February-19-10 11:49 AM
>> To: RFI
>> Subject: [RFI] Frustrating White Noise
>>
>> Bear with me gentle readers, this is a tale of woe! <<GRIN>>
>>
>> About a month ago, my noise floor on 40 and 75m , ie: white noise,
>> rose to
>> 9 and 10 over. In the AM, the noise floor is where it normally
>> is...1
>> - 3 s
>> units. Then, around 9 or 10, give or take, the noise floor gradually
>> climbs
>> back up over 9. Temperature does not appear to be the culprit. Feed
>> line
>> (RG-8X) tests good and no water present. Balun was replaced..no
>> change
>> in
>> noise characteristic. (Antenna is a BuxComm 6-80 Windom at 30 feet.)
>>
>> I connected the radio (Kenwood T-2000X) to a battery, and turned off
>> the
>> master switch so no power was coming into my house.. No change in
>> noise
>> level. There are no overhead wires in my neighborhood and the
>> closest
>> major
>> overhead power line is a mile and a half away.
>>
>> The frustrating thing is that it is pure white noise..no electrical
>> type of
>> noise...buzzing, chirping, whistling, crackling, etc., just what you
>> hear
>> for a noise floor.
>>
>> Any thoughts? What instrument would be needed to have something like
>> this
>> down? The AM radio trick sure doesn't work...no overhead
>> transformers
>> to
>> knock about. Mercury vapor street lights are off when the noise
>> level
>> starts to climb in the late morning.
>>
>> I am at my wit's end on this one....
>>
>> Joe Wolfe
>> WA6RKN
>> Reno, Nevada
>>
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>
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