Re: [sdiy] Zeners!

[Roman]

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/Minisonic2_Figures/Fig8.gif
>
>
>Thanks!
>Julian
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