A very good friend of mine who lives in the Boulder, CO, area, has been
fighting very bad noise interference issues for several years. It turned
out that the signals emanated from ballasts on Marijuana grow lights all
over the place. My friend is a very good electrical engineer, and he
knocked on the door of every home where he traced the signals from.
Surprisingly, most of the responsible parties were willing to work with him
in attempts to solve the interfering signals. The growers loaned my friend
ballasts from the various manufacturers, and he was able to design filters
that totally eliminated the errant signals. Most of the people were willing
to pay my friend for the cost of the necessary hardware. Every time that
someone new came along with grow lights, they were usually willing to
contact my friend and have him deal with the problem before he got around to
tracking them down. Word of mouth in that segment of the population was
very effective and efficient. The bottom line was that what could have been
a major problem for ham operators ended up being essentially no problem at
all because everyone was willing to cooperate and deal with the issue before
the FCC had to be contacted.
Best 73
Alan R. Downing
Phoenix, AZ
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Mark Torgerson
Sent: Friday, November 15, 2013 7:13 AM
To: [log in to unmask]
Subject: Re: Anoying Interference Issue
Hi
I remember my old trs 1000 had a CPU set to 7.150 MHz. I could really
hear that one on 40 meters. Smile. This was back in the late 1980's.
God bless,
Mark and my beautiful wife Noella
God loves You!
My YouTube Channel: http://www.youtube.com/user/ChristianTraditions2
The Blind Computer People List:
http://christiantraditions.info/mailman/listinfo/blindcomputerpeople_christi
antraditions.info
Follow me on Twitter: https://twitter.com/TorgersonMark?refsrc=email
-----Original Message-----
From: Dave Marthouse
Sent: Friday, November 15, 2013 7:38 AM
To: [log in to unmask]
Subject: Re: Anoying Interference Issue
Tom,
You may wish to put ferrite beads on all the cabling that lead into your pc.
From what I have read over the years is that lots of interference from
computers is radiated from the cables leading to various peripheral devices.
That may be a good way to go.
Dave Marthouse N2AAM
[log in to unmask]
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Tom Behler
Sent: Friday, November 15, 2013 8:30 AM
To: [log in to unmask]
Subject: Anoying Interference Issue
Hi, all.
As I think many of you know, I am currently in the process of switching to a
Windows 7 PC as my main home computer. I will be using the PC for both
professional and personal purposes here in my home office.
My home office is also where I have my ham station set up, which does have
its advantages if I need to take a little break and check out the bands
every once in a while. (grin)
Anyway, I have just noticed that when this new computer is running, it
places all sorts of little birdies across the HF bands, particularly the
higher HF bands like 10 and 15 meters.
To me, this obviously means that the computer has a very poorly-designed
switching power supply.
My question is what might I be able to do to minimize this interference?
I have thought of switching the computer to another circuit in the house,
but that would involve running an extension cord into another room, which
could be a bit of a pain.
If there is a fortunate side to this dilemma, it is that I am not going to
be using the PC for ham radio applications such as logging, rig control, and
the like. Those functions are done via a separate Windows XP laptop that I
have on my ham radio operating desk.
Of course, the obvious low tech solution to this issue would simply be to
turn off the main PC whenever I am operating on the HF bands, and I may have
to resort to that for now.
If, though, there is something else I might want to try, please let me know.
Tom Behler: KB8TYJ
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