[Premium-Rx] interference caused by tv sets

[mikea]

On Tue, May 20, 2003 at 11:39:14AM -0700, Greg W. Bailey wrote:
> You beat me to it Nigel-  I know it isn't the answer Herb wanted to read,
> but......  turning off the TV is an answer.
> 
> To assist Herb, I find my biggest nose generator is the FAX machine.  It
> generates a bursts about every 70 KHz all the way from 1.5 to 35+ MHz.  I am
> assuming it is the fast risetime of the uProcessor's data lines that is the
> cause?  My fix is simple, basically, if you want to FAX me, call ahead and I
> will turn it on.
> 
> With the application of more dedicated uProcessors in everything from
> refrigerators to perhaps the common tooth brush, this problem is going to
> get ugly in the future.  Further, while Herb can turn off the TV,
> discontinuing the operation of the family refrigerator is not an option.
> I'll put money on the fact that most of our membership already has the
> problem in one form or another.
> 
> Herb, let us know if you find a solution, I got this feeling this is a topic
> that will be revisited.

There is, of course, the not-always-perfectly-successful solution of
putting ferrite beads (or bigger chunks of ferrite) on everything
that comes out of the TV, as close to the circuitry as possible. That
probably won't get it all, but it may make it tolerable.

What are you using for an antenna feed on your HF RX? COuld its
resistance to interference be improved? How about ferrite beads on the
power and control lines, in an effort to keep power-line noise from
being conducted into the RX?

-- 
Mike Andrews
mikea at mikea.ath.cx
Tired old sysadmin since 1964