[sdiy] Elektor Formant synth build

[gino wong]

I think what you thinking of doing is a wonderful idea, do let the remark
below discourage you from your overall idea.

I would suggest that you go for a more modern system.  The scarcity of
obsolete parts along with the lack of modern conventions like routing for
headers and power ports on the original boards would make this a labour of
love for a few and a rats nest for everyone else.

On Sun, Nov 8, 2015 at 11:42 AM, Terje Winther <
terje.winther at wintherstormer.no> wrote:

> Are you referring to the FET followers selections here?
>
>
> Yes, among other things.
>
> 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.
>
>
> Indeed! The PCB and front panel set I got came with some original NOS
> parts, so I used them where I could, meaning I had to do the necessary work
> to make them function properly. In other places I had to substitute newer
> parts, and the upgrades described in book 2 was really useful in that
> regard.
>
> As said by others, first find the parts you need, only then build it. But
> a more modern design may be preferrable.
>
>
> I think so too.
>
>
> Terje
>
>
> 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.
>
>
> Terje Winther
> terje.winther at wintherstormer.no
> http://wintherstormer.no/
>
>
>
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>


-- 
*Gino Wong Birgelo  *BSComm, BSEE, PhP

ReRed Recording
Girard Hall Studios (ReRed Treehouse)
*527 W. Girard Avenue *
*Philadelphia, PA 19123 USA   *
*215 717 7059*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20151108/d3c8f816/attachment.htm>