[sdiy] Zeners!

[Julian Bunn]

Thanks Roman. In the end I decide it was too critical a component to compromise, so went out and bought a 5V1 zener.

Julian 

> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl 
> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Roman
> Sent: Thursday, May 06, 2004 11:59 PM
> To: Julian.Bunn at caltech.edu
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Zeners!
> 
> better to use 4.3V zener in series with a diode. About 5V 
> then, and much sharper knee than 2V7+2V4 zeners. But in this 
> application it looks like zener voltage determines attack 
> peak, so with common 5V6 zener it will work OK without 
> noticable difference. I think.
> Or use transistor with resistor divider from collector to 
> emmiter, middle to the base. Then you can set "zener" voltage 
> by resistor values. This can be found in power amps.
> 
> Roman
> 
> ---- Wiadomość Oryginalna ----
> Od: Julian Bunn <Julian.Bunn at caltech.edu>
> Do: 'Synth DIY List' <synth-diy at dropmix.xs4all.nl>
> Kopia do: julian at cacr.caltech.edu
> Data: Thu, 6 May 2004 11:59:38 -0700
> Temat: [sdiy] Zeners!
> 
> >
> >The Minisonic2 envelope shapers use 5.1V Zeners. I found 
> last night that one
> >of the Zeners I have used is misbehaving, and I don't have a 
> replacement.
> >
> >My question for the electronics guys on the list is: if I 
> find two lower
> >voltage Zeners in my parts box that add to 5.1V can I use 
> them in series
> >to fake a 5.1V Zener?
> >
> >For the interested, the circuit of the Envelope Shaper is at:
> >
> >http://pcbunn.cacr.caltech.edu/jjb/Synthesizers/Minisonic2/Mi
> nisonic2_Figures/Fig8.gif
> >
> >
> >Thanks!
> >Julian
> >
> >
> >
> >
> >
>