[Elecraft] K3 LoCut/HiCut

[Amateur Radio Operator N5GE]

Nate,

Your explanation is excellent.

One of the things I miss in the Rice Box Radio manuals are the diagrams used to
describe this type of thing.  Sometimes a picture really is worth a thousand
words.

73,

Tom Childers
Radio Amateur N5GE
Licensed since 1976
QCWA Member 35102
ARRL Life Member


On Wed, 24 Nov 2010 15:31:38 -0600, Nate Bargmann <n0nb at n0nb.us>  wrote:

>* On 2010 24 Nov 14:55 -0600, n6lrv at cox.net wrote:
>> Would someone please explain the purpose and function of the low cut and high cut controls on the K3? There doesn't seem to be any explanation I can find in the current user's manual and I'd like to make sure I'm understanding their function correctly because the response I see on the P3 passband icon contridicts what I expected to see occur when increasing or decreasing either setting. Thanks very much.
>
>Gary, it may be easier to visualize each control manipulating a variable
>high pass and low pass filter.  The Lo Cut cuts off low frequencies, or
>rather, sets the cutoff frequency of a high pass filter.  The Hi Cut
>does likewise, except it controls the cutoff frequency of a low pass
>filter.  They allow you to adjust either side of the passband 
>independently.  You can acheive the same thing with the Width and Shift
>controls it's just that the way the K3 is set up using Width works well
>on CW as it adjusts both cutoff frequencies but maintains a constant 
>center frequency of the passband.  On SSB using either the Lo or Hi Cut
>controls can significantly reduce QRM from one side or the other.
>
>On my recently departed FT-920 only the Lo and Hi Cut controls were
>available in the DSP.  I like the K3's selection of either way of doing
>it depending on the situation.  Over this past SSB Sweepstakes I found
>the Lo/Hi Cut indespensible for digging stations from between others.
>
>Experiment!
>
>73, de Nate N0NB >>