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Old August 11th 08, 06:26 PM posted to rec.radio.amateur.antenna
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Default Fluorescent light RFI solved


"JIMMIE" wrote in message
...

Could it have been that only one of the new lights was causing the
problem.

Jimmie


I verified that each of the lights by itself was a problem. Bad
manufacturing lot? Who knows? All I know is that they were unacceptably
RFI-polluting. I got rid of them and replaced them with lights that were--
right out of the box-- free of RFI. Problem solved. Hope this saves someone
else the three hours of work it cost me.

There is no way I was going to go back to the store and buy four more of the
bad lights on the basis of "Well, maybe four is too small of a sample size
to draw any conclusions." Fool me once, shame on you; fool me twice, shame
on me.

I reward companies that make RFI-friendly products and punish those that
don't. Always have lived by that dictum. I also try at every turn to educate
my neighbors to the same, so that we can all have as quiet an RF environment
as possible. Hence, my purpose in posting the original post here.

Al W6LX



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Old August 11th 08, 06:50 PM posted to rec.radio.amateur.antenna
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Default Fluorescent light RFI solved

News Features wrote:
"JIMMIE" wrote in message


...
I reward companies that make RFI-friendly products and punish those that
don't. Always have lived by that dictum. I also try at every turn to educate
my neighbors to the same, so that we can all have as quiet an RF environment
as possible. Hence, my purpose in posting the original post here.

Al W6LX


Absolutely, to everything in your post! The data is much appreciated
.... one thing I am still searching out is a transparent shield for the
tubes themselves; I have considered a shield made of screen but have
not acted on it (lazy/other-things-to-do.) I suspect rfi is using the
plasma discharge in the tube itself as some type of inefficient antenna,
as I have all shielded electronic ballasts ...

In addition, got any ideas he

What do you do about wifi switches/routers/wireless-nics/etc?

It seems, to me, the frequencies which the Ghz signal(s) are modulated
at, by the data stream of bits, is/are the real offender(s)? Other than
the strategic placement of these devices and directional antennas, I
have found little control over the RFI. I have found this to be a
problem on AM/FM/SW/VHF/SHF; I have noticed, some devices/brand-names
are less offensive than others ... I am, mostly all, Linksys with a
couple of NetGear nics ...

Any ideas from anyone would be appreciated here ... and yes, any
hard-cabling/power has been well choked with ferrite beads and filtered
power-strips ...

I am asking because I have noticed, a person working to cure one form of
RFI will, most likely, be working on "next one", next ... :-)

Regards,
JS

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Old August 11th 08, 07:19 PM posted to rec.radio.amateur.antenna
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Default Fluorescent light RFI solved


What do you do about wifi switches/routers/wireless-nics/etc?

It seems, to me, the frequencies which the Ghz signal(s) are modulated at,
by the data stream of bits, is/are the real offender(s)? Other than the
strategic placement of these devices and directional antennas, I have
found little control over the RFI.


Hi, John,

I have found the exact same thing as you. The modulation rate on those
wireless modems and such fall right in the HF band. You've already listed
what I've tried: antenna orientation.

However, most of those things have a variable power output. You can "log in"
to
them via a web interface; point your browser to their IP address and you can
perform administrative functions including adjusting the output power.

One of two things will happen: Increasing the output power may cause the
data rate between your computer and the router to increase, pushing the RFI
higher in the HF spectrum. Or, you may find that using the minimum power
possible you can reduce the interference level. I guess what I am saying is
try changing it and see what happens.

The one I am using right now is an AT&T wireless DSL modem made by 2Wire.

Good luck,

Al W6LX









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Old August 11th 08, 07:29 PM posted to rec.radio.amateur.antenna
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Default Fluorescent light RFI solved

Al Lorona wrote:

Hi, John,

I have found the exact same thing as you. The modulation rate on those
wireless modems and such fall right in the HF band. You've already listed
what I've tried: antenna orientation.

However, most of those things have a variable power output. You can "log in"
to
them via a web interface; point your browser to their IP address and you can
perform administrative functions including adjusting the output power.

One of two things will happen: Increasing the output power may cause the
data rate between your computer and the router to increase, pushing the RFI
higher in the HF spectrum. Or, you may find that using the minimum power
possible you can reduce the interference level. I guess what I am saying is
try changing it and see what happens.

The one I am using right now is an AT&T wireless DSL modem made by 2Wire.

Good luck,

Al W6LX


AL:

I was just "about" with a FSM and freq. meter ... the worst offender is
a Linksys "Wireless-N Home Router"--WRT150N ...

I am logging into 192.168.1.1 (the web interface to the router) to
search for the settings you mentioned, it has a TON of settings ... will
get back to you!

I cannot believe I didn't think of that, again, I claim Alzheimers'! ;-)

THANKS!

Regards,
JS AKA Brett :-)


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