[1000mp] tip: switching in extra band filters for reception

[Tom Rauch]

>   The one I am using is the original that came out in CQ about 1996.
> Doug did modify it to a QRN Squasher MKII  (or something like that)
> about a year later. I built it and went back to my old one. I don't
> know what to say other than, I bought an ANC-4, plus several DSP units
> to try to somewhat eliminate my severe line noise here. 

Interesting.

I expect a DSP system would not do much, because power line noise 
generally has a very high peak to average voltage value and a very 
fast rise and fall requiring a lot of bandwidth. By the time it goes 
through any receiver stages, especially if the stages have limited 
bandwidth, the noise "muddies up" and starts to look like a desired 
signal to any blanker or DSP system.

The good results you have with the QRN Squasher is a real puzzlement, 
however!73, Tom W8JI
W8JI@contesting.com