[Elecraft] K3 APF Adjustable Q

[Ron D'Eau Claire]

Good point, Paul, but my experience with this sort of filter says that
variable Q also affects the peaking amplitude. 

That is, the higher Q is obtained with more feedback which results in more
gain.

Ron AC7AC


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Paul Christensen
Sent: Sunday, October 31, 2010 4:50 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 APF Adjustable Q

I suspect the moment variable Q were to become available, soon thereafter, 
the next request would be for variable peaking amplitude. At some point, 
Elecraft must decide what they want from APF -- is it an emulation of a 
filter used in a transceiver from twenty years ago?  Or, is it something 
more?  If it's more, then it may as well be a full-blown parametric EQ 
channel with variable amplitude, variable frequency, and variable Q.

I tend to agree with Al's comment where he noted that sometimes the most 
effective controls are the one's that are easily accessible to the op 
without the need for added manipulation.

Paul, W9AC