[sdiy] Elektor Formant synth build

[Rick Jansen]

Are you referring to the FET followers selections here?

They can be prevented by using the LF356 instead, as a high impedance follower, as described in book 2. I did that. Unfortunately LF356 itself is now obsolete I think, but you'll find another I'm sure. I used the metal can LF356, which can easily be bent to replace the  FET follower on the existing PCB.

As said by others, first find the parts you need, only then build it. But a more modern design may be preferrable.

rick

> On 08 Nov 2015, at 17:06, Terje Winther <terje.winther at wintherstormer.no> wrote:
> 
> As for building: for me it was much more work than modern modular DIY synths, because you need to select parts in a much more specific way then on modern modulars. For several of the modules I needed to build small test-circuits on veroboard so I could select correct transistors, diodes and ICs, and for some of the modules it is a fairly specific way of adjusting the trimmers or even finding the correct value of a resistor, involving desoldering parts, shorting out components and connections and the like. Quite doable, of course, and everything is very well explained in the book, so even though it is a little more work than on contemporary DIY modulars (which are easier to build and works pretty much straight away), it is mostly fairly easy to build these modules.