Does DSL cause any interference with radio?
--
Ron Hardin


On the internet, nobody knows you're a jerk.

Ron Hardin wrote:
Does DSL cause any interference with radio?

I started using DSL about a month ago. No perceptible increase in RFI
was heard on my Ten-Tec RX320. The principal offender in my shack
remains the CRT computer monitor.

Which brings me to a question. Sometimes, the CRT causes a real racket.
At others, none. Unless the amount of emitted RFI varies greatly, do
local atmospherics amplify or attenuate it?

On Wed, 05 Apr 2006 15:16:29 GMT, Ed wrote:

Ron Hardin wrote:
Does DSL cause any interference with radio?

I started using DSL about a month ago. No perceptible increase in RFI
was heard on my Ten-Tec RX320. The principal offender in my shack
remains the CRT computer monitor.

Which brings me to a question. Sometimes, the CRT causes a real racket.
At others, none. Unless the amount of emitted RFI varies greatly, do
local atmospherics amplify or attenuate it?
As I recall on a CRT there can be some harmonic rich square waves and
overshoot in the deflection coils caused by high contrast borders in
the displayed image. I suggest you switch to a nice LCD. Your eyes
will thank you.

"Ed" wrote in message
news:hbRYf.4616$te1.2329@trndny03...
[snip]

Which brings me to a question. Sometimes, the CRT causes a real racket.
At others, none. Unless the amount of emitted RFI varies greatly, do
local atmospherics amplify or attenuate it?

The amount of RFI can vary greatly. The harmonics from the sweep circuits
will change with the resolution. The RFI from the video will change with
the picture information.

Frank Dresser

Frank Dresser wrote:
"Ed" wrote in message
news:hbRYf.4616$te1.2329@trndny03...
[snip]
Which brings me to a question. Sometimes, the CRT causes a real racket.
At others, none. Unless the amount of emitted RFI varies greatly, do
local atmospherics amplify or attenuate it?

The amount of RFI can vary greatly. The harmonics from the sweep circuits
will change with the resolution. The RFI from the video will change with
the picture information.

Frank Dresser


Thanks, Frank.

In article ,
Ron Hardin wrote:

Does DSL cause any interference with radio?

The switching supply for the Linksys router I use generates a lot of
noise. Don't get a high speed connection DSL or cable without a hardware
router between it and the Internet. Get the router as a gateway and use
the Windows XP firewall.

--
Telamon
Ventura, California

I have two intereference sources in my shack - the CRT's and the 4 port
hub.

The CRT intereference occurs on harmonics of the line frequency and if
one appears on a wanted signal, I go into Properties, Settings,
Advanced and shift the monitor to a new frequency.

The LAN into my hub is 100ft long and radiates a variety of noises and
the 100MHz hub is much worse than the 10MHz hub, so my only workaround
here is to swap hubs if the occasion demands. The DSL is not a cause of
any noises, just the stuff distributing it!

Brad.