[sdiy] reverse biased NPN vs Zener diode for noise...

[Tim Daugard]

>>> From: Benjamin Budts <mailing at gigaspeeds.be>
>>> Subject: [sdiy] reverse biased NPN vs Zener diode for noise...
>>> To: "synth-diy DIY" <synth-diy at dropmix.xs4all.nl>
>>> Received: Friday, 30 October, 2009, 3:13 AM
>>>
>>> Hi,
>>>
>>> I'm looking into building a noise module and I'm wondering
>>> what the audible difference is between
>>> reverse biased NPN based vs Zener diode based... :-D

Here are my attempts at noise sources complete with pictures:

http://members.cox.net/synthfred/h_onxxx.htm

 All three use 6 volt zener diodes to generate the noise. All three amplify 
the current through the diode and not the voltage across it.

Tim Daugard
AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
http://members.cox.net/synthfred/h_toctop.htm (Fred's online edition)