[Elecraft] K3 2.7kHz filter DSP FC

[Dave Hachadorian]

----- Original Message ----- 
From: "Stewart Baker" <stewart at baker.nildram.co.uk>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Wednesday, March 19, 2008 11:35 AM
Subject: [Elecraft] K3 2.7kHz filter DSP FC


Can someone explain to me why with the standard 5 Pole 2.7 
kHz
filter the DSP FC = 1.6kHz ?

Looking at the NORMed DSP for that filter the LO = 0.25 kHz 
and
the HI = 2.7 kHz.

So I would have thought that FC = (2.7 - 0.25) / 2 or 1.225 
kHz
say 1.2 kHz.

Maybe my idea of what FC represents is wrong..
----------------------------------
I don't have a radio, so I'm guessing at what all these 
number mean, but I think that when you did the average it 
should have been (2.7 + 0.25)/2 = 1.475

It's not all the way to 1.6, but closer.

Dave Hachadorian, K6LL
Yuma, AZ