[Elecraft] SHIFT pitch

[Don Wilhelm]

I suspect that the filter gain rather than the width is the major cause 
of that behavior.
Try working with the FLx GN setting in the CONFIG menu to see if you can 
obtain a smoother transition.
You could expect the widest filter to have the smallest loss, so start 
with the transition between FL1 and FL2 and when that seems right, move 
on to the FL2 and FL2 transition, etc.

The easiest way to do this is with a broadband noise generator (such as 
the Elecraft NGen) so you have a constant input to the K3 and it would 
be easy to evaluate the audio level using Spectrogram or some other 
audio spectrum analyzer, although a AC DMM connected across the speaker 
would give decent results.

Once you have the filter gains equalized, you can easily change the 
filter offsets if necessary.  While the 8 pole filter offsets are close 
to zero, it is not practical to expect that  they are all exactly zero.

73,
Don W3FPR

W5UN wrote:
> I have three 8 pole filters installed, 2.8, 1.8, and .4 kHz. As I 
> rotate the WIDTH knob, the filters switch in and out at their 
> transition frequencies (as they should). But when that switch occurs, 
> the background noise pitch frequency seems to jump to a different 
> SHIFT frequency setting.  In other words, the transition between 
> filters is not smooth.
>
> I am wondering if all K3's with 8 pole filters do the same thing as mine?
>
> My filter offsets are all set to zero, as that is what I am told the 
> 8 pole filters offsets should be.
>   
>