Wow, good work Bob.
Thank you for sharing it with us. I made my wife throw out all (2) the
touch lamps and removed all "dimmer" switches. (It makes the radio
"dim") but never thought about the router causing birdies that I do have
(always on your favorite freqs).
Can you explain what the signal injector behind the panel was for?
Ron wb1hga
(still not entirely noise free, yet)
ROBERT CARROLL wrote:
I have recently moved to a new QTH and am slowly getting things in shape to
get back on the air. I ran into a lot of nasty RFI problems. The previous
owner had installed "smart house" wall switches throughout the house. They
were supposed to control incandescent lamps only, but in fact they
controlled fans, wall outlets, etc. Besides sending a few entertainment
radios to the dump before I figured out what was going on, the RFI was
horrendous. Gradually I removed them only to find I still had problems.
While doing some electrical work an electrician found the signal injector
for the system behind the main breaker panel, and that eliminated nearly all
the noise.
I should say nearly all the broadband noise, as I was left with birdies
about every 30 kHz or so. Eventually I tracked those down to a Linksys
Wireless G router, model wrt54gs. My previous Linksys bit the dust just
before I moved, so I can't say if I would have heard the birdies from this
one had I installed it in the old QTH. I have wireless and wired
connections running off this router, and have helped the problem by
installing ferrite on the power wart lead and all the data leads. But I
have not been able to eliminate the rather broad birdies that seem to fall
at nice dx frequencies.
Has anyone on the reflector had such a problem and found a way to cure it?
Searching on the internet I find that RFI from routers is a well known
phenomenon, but I have seen no suggestions for curing the problem.
Bob W2WG
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bob - W5BIG
Sent: Wednesday, August 10, 2005 9:32 AM
To: tom.w3qs; 'Elecraft Reflector'
Subject: Re: [Elecraft] Interference from Computers
Hi Tom,
One major source of noise is the CRT monitor. It helps to make the screen
display as uniform as possible, like a blank window or a plain background
without texture.
73/ Bob - W5BIG
----- Original Message -----
From: "tom.w3qs" <[EMAIL PROTECTED]>
To: "'Elecraft Reflector'" <[email protected]>
Sent: Wednesday, August 10, 2005 7:03 AM
Subject: [Elecraft] Interference from Computers
Good Morning Group,
I am back on the air (4991) after nearly 20 years. The first thing I
noticed was all the interference on 20 meters. Hetrodynes everywhere!
What's going on?
Took me a while to figure out that it was the computer - not there 20
years
ago!
So, other than removing it from the shack (ghastly thought) is there any
font of wisdom on this subject or general guidance?
Thanks and 73,
Tom, W3QS
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