[Elecraft] Q on Setting K3 Filter Offsets

[Don Wilhelm]

Grant,

The answer depends on how much you can trust your ears to discern pitch 
- mine are terrible at that task, so I use the spectral analysis 
software as my 'crutch', but if you have good pitch recognition, your 
settings may be as good as it gets.

73,
Don W3FPR

Grant Youngman wrote:
> I have all 8-pole filters in my K3.  I've always noticed a slight  
> audio response difference between LSB and USB positions.  Read some  
> list history on the topic.  I do have a wideband noise generator and  
> spectral analysis software, but have been too lazy to get everything  
> set up.  So I did a quick and dirty, just equalizing the receive  
> response aurally on all of the installed filters.
>
> Ended up with  -0.12 on the 2.8, +0.06 on the 1.8 and -0.05 on the 400.
>
> I'm curious wether the experts around here think that's close enough  
> for government work, or if it's really worth going the spectrum  
> analyzer route.  Could these results just be due to unequal skirts,  
> and maybe I should just "don't worry, be happy" and leave the 8-pole  
> offsets set to zero?
>
> Thanks ... Grant/NQ5T
>   
>