Elektor Formant

[tomg]

ooops! this is the old version. it would be a good example if I had
executed it a little better. I'll fix this asap...sorry.  The fix would be
to  swap the 12,13,14 tranny and the 6,7,8 transistor...It still 
won't work like a 726...;-(

Tom.


> >Would it be possible to replace the ua726 with a modern
> > equivalent ?
> > 
> > Stephen Gray
> 
> I tried to do this several times without sucess. I have never found 
> the magic combination that makes a standard diff-pair act like a 
> 726. I can get them to almost work... but not. Oh yeah...I got lots 
> of expo-converters!  The cookbook is full of them.
> 
> Take a look at this one. It uses a 3046 heater. 
> http://www.xavax.com/efm/cbook/vco2a.html
> 
> But nothing works like a 726. It may not be possible. I'm saying 
> that hopeing that somebody will prove me wrong..;-)
> 
> Alternatly the VCO4 series has multipule outputs, is very stable
> and uses common stuff. Damm nice actually..;-)
> 
> Tom
> 
> 
> 
> 
>