[Elecraft] DSL filters as RFI filters -- don't bother!

[Vic K2VCO]

I've collected a large number of DSL telephone filters from various 
installations.  Someone recently suggested that they can be used as ham 
RFI filters, since they are supposed to isolate the telephone from the 
DSL carrier.  Although the DSL signal is much lower in frequency than 
ham signals (I believe 10-100 KHz, correct me if I'm wrong), I thought 
it would be worth a try.

I tried four different types of DSL filter and compared them to a KCOM 
RFI filter designed for 3-30 MHz.  I transmitted 100w CW on 7 MHz into a 
vertical.  With no filters, the keying could clearly be heard.  The KCOM 
filter was quite effective, suppressing most of the interference.  The 
DSL filters appeared to have no effect.

So much for that idea.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco