I'm reposting this to the reflector:
Yes, I do have DSL. I have a very good RFI filter on the DSL line coming
to the modem so I think it might be a cabling problem. Everything was
working FB until recently when I reconfigured the hardware. I have a few
clamshell filters and I also have some shielded cables so Monday I will do
some substitutions and see if it helps. The problem is not across the
entire band. It's only below 1825. Frequencies above 1825 don't bother
me.
This is probably 160 meter RF triggering the modem. Common mode chokes and
shield normally will not do the trick, because the problem is differential.
First, you need an immune modem. The best modem I found was a 2wire ADSL
modem.
Second, filters are almost impossible to buy. Because of that, I built my
own filter. I added peaking at the high end of DSL, which for ADSL ends in
the upper middle AM broadcast band area.
http://www.w8ji.com/adsl_filter.htm
73 Tom
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Topband Reflector
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