PLAN B analog blog

PG:  No.  If your M11 self oscillates there's no need to do this.

I don't think a photo is nesessary - - it's really easy to find this part .I'll send another post with this info.





Is this for all the evil twins sold so far? Can you show us via photo 
where on the PCB and what PCB to look at.

Ross

(i think you can figure that out) wrote:
>
> We've shipped something like 36 of these guys and I have head comments
> like this now twice. It's the vactrols, they are all all over the
> place as far as response. There's an easy fix and I apologize this is
> happening.
>
> R51 is currently a 5.1K (that's green/brown/red bands). If you have
> the means, change that to a 3.9K (orange/white/red). This will
> compensate for the higher resistance of the vactrol that effects feedback.
>
> R51 is easy to spot. It's about an inch behind the trim pot on the
> bottom board, the one with the jacks soldered to it. It's sort of out
> on it's own, not in a cluster with a lot of other components. If
> you're nervous about removing the current one (5.1K), just cut it out
> and solder the 3.9 K to it's pads on the bottom side of that board.
>
> - P
>
> --- In PLAN_B_analog_blog@yahoogroups.com 
> <mailto:PLAN_B_analog_blog%40yahoogroups.com>, "gabu_004" <gabu_004@...>
> wrote:
> >
> > Hello,
> >
> > So just a smal review of the M11.
> > Nice timbre and pretty dirty compared to the many other filters out
> there! Also I like the 2
> > simultaneous 6 and 12 dB output, can keep something quite fat still
> with some thinner and
> > interesting timbral modulations (hi-Q, small bandwidth). The twin
> feedback switch makes it
> > one of its kind really! Two resonnance peaks at the same time gives
> some interesting results
> > there.
> >
> > Just one question for Peter now:
> >
> > It says in the specs that it will self osciliate... So far I haven't
> achieved to do so, I've put to
> > max the Res and Bandwidth pots, played around with the freq, yes
> there's an output(12dB)
> > and the module is powered... Could it be that it doesn't self osciliate?
> >
> > But except for the self osciliation expectation, I really love my
> new filter and recommend it to
> > everyody out there doing harder stuff...or whatever, everybody, no
> matter what hehehe!
> >
>
>