G’day
For those looking for insight into how the NCC-1 noise canceller works,
I’d suggest looking at the following two web pages:
1. http://www.eham.net/ehamforum/smf/index.php?topic=75951.0
This is a thread on noise cancelling started by Martin G8JNJ and
finishes with a brief exchange of posts between Martin and Tom W8JI (who
according to the second of Tom’s posts here, is the person who designed
the NCC-1).
2. With this in mind, then have a look at Tom’s web page at
http://www.w8ji.com/mfj-1025_1026.htm.
If you read this on the basis that Tom designed the NCC-1 and that he
talks about the homebrewed noise canceller design he uses on his web
page, that may give you a good insight into the design of the best noise
canceller on the market. ;-)
While there may not be a schematic available, there is some very
interesting information available about the thinking behind the NCC-1
design.
I should add that Tom's web page is a gold mine for those who want to
understand about how to do successful noise cancelling.
Vy 73
Steve, VK6VZ
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