[sdiy] more about the scanner vibrato

[jhaible]

> very nice stuff!!
>
> jhaible wrote:
> > Picture of prototype, and some thoughts about making a pcb.
>
> There you wrote:
> "But please note that due to a required distance
> between the inductors, this will not fit into the
> form factor of modular synthesizers (not even the
> bigger ones like MOTM)."
>
> The distance to be kept has to be sideways, hasn't it?
> In order to fit it anyway into e.g. MOTM or
> synth.com would a sandwich solution for the pcb be
> possible?

I wouldn't make a sandwich. Then there might be coupling
over more than one stage.
I have made a quick test of coupling with two inductors
and a 2-channel scope, and the inductors should be arranged
on the pcb in a specific way to make the remaining coupling
*positive*, and still there is some distance needed. Remember,
this is no special, expensive construction; it's cheap standard
ferrite inductors. I was surprised to see them work at all
(and much better than I expected, i.e. not much compensation
necessary), but this project is destined for a 19" 1U rackmount
enclosure.

JH.