PLAN B analog blog

Jari,

the M25 is about 3 inches deep, possibly a little less than that.

The ring is AC coupled.  This particular circuit did not yield a lot
of difference between the two modes, but it was so damn quiet in
carrier suppression I didn't want to mess with it just to add a
feature everyone and their mother has done already.  Instead I added a
switch selectable feedback mode which nobody's done.  There are ring
feedbacks out there, but none that sound like the M25's.

The top section of the M25 has two ways of getting noise.  One is
white and comes out of it's dedicated output.  That's available all
the time. The other output is the attenuator out which is present only
if there's no external signal patched into the attenuator's input
jack.  If you have the attenuator switch to level, the pot gives you
level control of the noise source. If the switch is set to waveshape,
then it bends that noise so it in effect operates like pink.

The output level of the noise is intentionally a bit low in amplitude.
 I love noise - when you want it.  What I don't like is it bleeding
back into the PSU's return line and screwing with all the other
modules in the rack. The M25 doesn't do this.

Hope this helps,

- P






--- In PLAN_B_analog_blog@yahoogroups.com, "jalmari3"
<jari.jokinen@...> wrote:
>
> How deep is it?
> 
> --- In PLAN_B_analog_blog@yahoogroups.com, "jalmari3" 
> <jari.jokinen@> wrote:
> >
> > Not much has been said about M25. Is it good?
> > 
> > Are noise and waveshaping available at the same time? 
> > "WIth no input present in the Attenuator/Waveshaper, the output of 
> the 
> > returns a manually-adjustable analog White Noise source. When the 
> Mode 
> > switch is thrown to left , the White Noise is shaded Pink. There is 
> > also a dedicated unity gain noise output."
> > The above quote suggests it is possible, but there are only three 
> jacks 
> > in the top section...?
> > 
> > Is the ring modulator AC or DC coupled? (I can't tell by listening.)
> > 
> > Best regards
> > Jari Jokinen
> >
>