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-   -   Household Noise Sources ? (https://www.radiobanter.com/shortwave/86815-household-noise-sources.html)

Telamon January 22nd 06 02:28 AM

To Ross et al: From OP: Household Noise Sources ?
 
In article _QBAf.97693$AP5.14846@edtnps84, m II wrote:

Telamon wrote:

2. EMI, electromotive interference, which is conducted noise. As
separate local electric and magnetic fields the energy falls off rapidly
over distance. A few feet can make a big difference in noise level.





I think we're confusing EMF (Electromotive Force), also known as Voltage
with EMI (Electro magnetic interference).


Good posting, though...


Yep, sorry about that EMI definition.

--
Telamon
Ventura, California

[email protected] January 22nd 06 03:08 AM

To Ross et al: From OP: Household Noise Sources ?
 
Yeah sure,shutting everything off in your house will improve radio
reception.But,I am not going to shut down my house for any radio(s) in
this World.Cat Ballou movie (I went and saw that movie here in Jackson
when it first came out,I was home on a three day leave from Fort
Hood,Texas) is just now starting on Radio tv and I better get me happy
arse back over yonder and see if that divorced woman in Petal,Mississipi
is drumming me up.
cuhulin


Ron Baker, Pluralitas! January 22nd 06 08:16 PM

Household Noise Sources ?
 

"Mark Zenier" wrote in message
...
In article ,
Ron Baker, Pluralitas! wrote:

I still hear some low level noise spaced every
62 kHz or so throughout the HF band.
It is not in my house but it might be in
the neighborhood.
Some day I'll get a directional antenna and
portable receiver and track it down.


A VGA display running at one of the lower res 31 kHz horizontal scan
rates.


Interesting idea.
But I've never noticed the noise change character.
One would think that a VGA display would be
turned off occasionally.

The noise is unchanged even if my monitor is
unplugged and every circuit breaker in the house, except
for that of the radio, is switched off.

If it is from a display it would have to be from
a defective one. Every display has a horizontal
in the tens of kHz range. We are not inundated
with display noise.

--
rb



clifto January 22nd 06 09:29 PM

To Ross et al: From OP: Household Noise Sources ?
 
Telamon wrote:
m II wrote:
Telamon wrote:
2. EMI, electromotive interference, which is conducted noise. As
separate local electric and magnetic fields the energy falls off rapidly
over distance. A few feet can make a big difference in noise level.


I think we're confusing EMF (Electromotive Force), also known as Voltage
with EMI (Electro magnetic interference).


Yep, sorry about that EMI definition.


Electromotive interference is EMI from a locomotive plant in La Grange, IL.

--
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.

Telamon January 22nd 06 09:37 PM

To Ross et al: From OP: Household Noise Sources ?
 
In article ,
clifto wrote:

Telamon wrote:
m II wrote:
Telamon wrote:
2. EMI, electromotive interference, which is conducted noise. As
separate local electric and magnetic fields the energy falls off rapidly
over distance. A few feet can make a big difference in noise level.

I think we're confusing EMF (Electromotive Force), also known as Voltage
with EMI (Electro magnetic interference).


Yep, sorry about that EMI definition.


Electromotive interference is EMI from a locomotive plant in La Grange, IL.


Funny!

--
Telamon
Ventura, California

Mark Zenier January 23rd 06 06:52 PM

Household Noise Sources ?
 
In article ,
Ron Baker, Pluralitas! wrote:

"Mark Zenier" wrote in message
...
In article ,
Ron Baker, Pluralitas! wrote:

I still hear some low level noise spaced every
62 kHz or so throughout the HF band.
It is not in my house but it might be in
the neighborhood.
Some day I'll get a directional antenna and
portable receiver and track it down.


A VGA display running at one of the lower res 31 kHz horizontal scan
rates.


Interesting idea.
But I've never noticed the noise change character.
One would think that a VGA display would be
turned off occasionally.

The noise is unchanged even if my monitor is
unplugged and every circuit breaker in the house, except
for that of the radio, is switched off.

If it is from a display it would have to be from
a defective one. Every display has a horizontal
in the tens of kHz range. We are not inundated
with display noise.


I've noticed that the spurs from CRT display horizontal drive usually
peak at a frequency spacing of twice the scan rate.

Another possible is a compact fluorescent lamp.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)



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