[sdiy] de-tuned by transport?

[Jim Patchell]

    One question I would have is what type of trimmers were they.  I prefer to use
the 10->20 turn type pots, especially for VCO tuning.  These seem to be pretty good
about staying where you put them.

    Also, you should lock the pot down with glypt (I think I spelt that right).  If
you can't find any, I have used finger nail polish to do this job...in fact, one
place I worked, we purchased AVON polish.  The woman who serviced our account must
have thought we were pretty strange...a bunch of guys buying all that finger nail
polish....

    -Jim


Christian.Bergmiller at daimlerchrysler.com wrote:

> Hi!
>
> This weekend i decided to carry my small modular synth to a music making friend.
> I put the whole thing into the back of my car and drove my way through the
> city...
> Arrived there i sadly discoverd some detuning of the oscillator's/filter's
> V/oct. scaling.
> Back home i noticed that nearly ALL trimmers settings must have been changed
> due to the vibration of the transport.
> I spent about one hour on calibrating all the V/Oct. scalings etc.
>
> Since i have never built a synth before i would like to hear how other's fixed
> that problem
> (if this is a common problem - maybe it's my temperature compensation that
> failed completely....)
> anyway - I used only high quality multi turn cermet trimmers if that helps.
>
> greetings
> Christian