[RFI] DSL Filter Update

Roger Parsons ve3zi at yahoo.com
Sat Mar 7 11:29:05 PST 2009

Just to advise the group that a couple of other stations have had success with this filter. Nick, VE3FJ, also checked out its frequency response with the following results:

1.85MHz   -26dB
3.65MHz   -46dB
7.24MHz   -68dB
14.13MHz  -60dB
21.0MHz   -56dB
28.5MHz   -54dB

Of course in theory the stop band attenuation should continue to increase with frequency, but in practice there will be strays across the filter that will cause a performance drop at higher frequencies.

73 Roger


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