Idiom Press make a SCAF-based audio filter called the SCAF-1. It's a
low-pass filter with a variable upper cutoff frequency. It also operates
in real-time with no ringing. Recordings of the SCAF-1 in action are
available on the web site:
http://www.idiompress.com/scaf-1.html
The standard disclaimer does NOT apply...
73,
- Rob
K2 #5004
On Thu, 06 Apr 2006 11:24:55 -0700, Rick Dettinger <[EMAIL PROTECTED]> wrote:
Keith - I do CW only and use the KAF2 and think that it is an
improvement.
But not to decrease bandwith, the IF filters handle that chore very
well. A
bandpass or lowpass AF filter cleans up internal noise that I find
tiring.
Another solution maybe headphones that cut off high frequencies. I
currently use Sony headphones that have good high audio frequency
response
so the audio filter is very helpfull. I like the comfort of the Sonys
but
would like CW phones that cut off frequencies above 600 hz. or so. I
also
have a passive outboard bandpass filter constructed from 88mh inductors.
The signal is very clean but the response is actually too sharp for most
use. I would rather it were designed as a low pass filter. This would
clean up all electronic noise. 73 - Rick - K7MW
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