PLAN B analog blog

In most situations (with my unit) I would call the difference between 
12 o'clock and full clockwise settings very subtle. If anyone is 
interested, here is a little test showing also some volume 
differences:
http://www.esnips.com/doc/4f90400f-87e7-4632-9e73-
28bbf9281611/Plan_B_Model_12_test

- 440 Hz saw in
- Level at 12 o'clock
- Bandwith at full counter clockwise
- Frequency little past 10 o'clock (emphasizing 3rd partial)
- Resonance at max
- Q Low
- Lowpass output

00:00 As above - Quiet output.
00:02 Bandwith to 12 o'clock - Big differene in timbre and more 
volume.
00:05 Bandwith to full clockwise - Very little difference.
00:08 Switch to Q High, which gives higher resonance frequency. 
Turning Freguency knob counterclockwise to emphasize 3rd partial 
again.
00:14 3rd partial found by setting Frequency knob at 9 o'clock - 
Strong resonance.
00:16 Bandwith to 12 o'clock (from full clockwise) - Subtle 
difference.
00:20 Bandwith to full counter clockwise - Very big difference in 
timbre and quiet output again.


Best regards
Jari Jokinen  


--- In PLAN_B_analog_blog@yahoogroups.com, "(i think you can figure 
that out)" <peter@...> wrote:
>
> You will notice that when you start increasing the resonance, 
subtilties from the 12 o clock 
> to full CW region of the Bandwidth knob will start to show 
themselves.  At low resonance 
> you won't hear thee quite so readily.
> 
> The change in Bandwidth pot value increases the amplutide of the 
first harmonic a bit. 
> Makes for a lisghtly fatter lowpass mode.
> 
> Thanks for your words on the filter...again, these are the types of 
comments that keep me 
> doing this.
> 
> - P
> 
> 
> 
> 
> --- In PLAN_B_analog_blog@yahoogroups.com, "jalmari3" 
<jari.jokinen@> wrote:
> >
> > The 6dB/12dB knob of my Model 12 does only microscopic changes to 
sound 
> > past 12 o'clock. On the other hand, it is very sensitive from 
full 
> > counter clockwise to 9 o'clock. I wonder, if this is this normal 
and if 
> > I am getting full range of adjustment?
> > 
> > Do the newer M12:s have 1M pot instead of 100K?
> > 
http://launch.groups.yahoo.com/group/PLAN_B_analog_blog/message/703
> > 
> > M12 is my favourite filter, but the output level varies quite a 
lot 
> > with different settings. For example, it seems a bit strange, 
that low 
> > pass 6dB/oct is much quiter than 12dB/oct.
> > 
> > 
> > Best regards
> > Jari Jokinen
> >
>