[sdiy] Oberheim OB-Xa noise generator transistor

Roman modular at go2.pl
Sat Jul 14 16:40:43 CEST 2018


Biasing Vbe in reverse does not damage transistor, just like biasing Zener diode in reverse does not break it.   Roman  Dnia 14 lipca 2018 05:16 Ben Bradley <  ben.pi.bradley at gmail.com > napisał(a):  This surely uses the Vbe back-biased to 5 or 10 volts to generate the  noise, which exceeds the rating and damages any transistor for  "normal" use, so you'll do good to throw away any transistor you try  in the circuit that you don't leave in.   On Fri, Jul 13, 2018 at 4:30 PM, Gordonjcp <  gordonjcp at gjcp.net > wrote:  On Fri, Jul 13, 2018 at 02:23:27PM -0600, Ian Fritz wrote:  This again?  The noisiest transistors have the most popcorn and 1/f noise.  The ones with these smoothest white noise are very quiet. But whatever you like, of course.   That's why I'd always go for a nice long LFSR, for preference ;-)   But you can pick a noise transistor you like the sound of.  It's unique.  Analogue Warmth, or some damn thing.   --  Gordonjcp  ______________________________  Synth-diy mailing list   Synth-diy at synth-diy.org  synth-diy.org synth-diy.org  ______________________________  Synth-diy mailing list   Synth-diy at synth-diy.org  synth-diy.org synth-diy.org
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