[RFI] Telephones and DSL

[N1BUG]

> Question about DSL. Can too much ferrite kill the DSL signal or
> mess up the SNR? Is the DSL signal affected by say a 160 tuned
> circuit/trap or is it a DC thing and not RF? I'm looking to cure
> 1 KW modem problems, right now I don't lose link but I can lose a
> page and have to refresh.

I don't have specific answers, but will add a comment. 160 meter RF 
would cause my DSL modem to drop connection with as little as 50 
watts, every time I hit the key. Common mode chokes didn't help at 
all. But the filter described here cured the problem 99.9% of the time:

http://lists.contesting.com/_topband/2007-10/msg00171.html

As for the other 0.1%, I have no idea. Occasionally when it is 
raining I still have problems. My SWR does not change at all in the 
rain, so I'm not sure exactly what the mechanism is. What's perhaps 
more bizarre is that it is not a consistent thing. It's actually 
quite rare, even during rain.

Paul N1BUG