Posted by
Sverre Holm-2 on
Jan 17, 2007; 8:49pm
URL: http://elecraft.85.s1.nabble.com/KPA100-D1-D8-voltages-tp442843p442846.html
> I've finished additional K2 receiver measurements and have posted them to
my web site,
> www.cliftonlaboratories.com.
Very interesting results, in particular the AGC performance curve.
I wonder about the statement "In an ideal receiver, once the threshold point
is passed, there will be little or no change in audio output with changes in
signal level." The way people speak so highly of the AGC action of their K2s
seems to contradict this. But then maybe this is called the ideal curve just
because it is easy to comprehend and draw for engineers.
I have worked enough with acoustics and psychoacoustics to have great
respect for the ear and our hearing. It is a very subtle instrument that is
not so easy to quantify in a simple curve. Maybe design of AGC
characteristics could learn something from the psychoacoustics that is built
into all modern sound coders, like mp3 and its descendants?
73
Sverre
LA3ZA
Unofficial Guide to K2 Modifications
http://www.qslnet.de/member/la3za/K2/mod.html--
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