FW: [sdiy] Best Way to limit control voltage

[larry at unicode.com]

Peter

Where in the store were they (the metal can 3080's) located?

FYI for anyone that wants to find the place:
	Apex
	8909 San Fernando Road
	Sun Valley,  CA   91352
	USA
	(818) 767-7202
	(323) 875-1308
	ApexSurplus at aol.com

It was mentioned that you would not want to be in the outside yard during an
earthquake.  Whoever said that did not look around inside!  At least outside
you'd have a chance!

Larry T.


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Peter Grenader
Sent: Monday, March 14, 2005 7:06 PM
To: synth diy
Subject: Re: [sdiy] Best Way to limit control voltage


Apex Electronics has a ton of metal 3080's...at least they did about six
months ago.

-P

Kevin Lightner wrote:


Why using Zener diodes when normal diodes should do the work?
Check Grant's last Scheme:
http://www.musicsynthesizer.com/DIY/Grant/OTA.html


These diode are indeed clamping the output, but a zener will not conduct
until it reaches it's rated voltage. 3080s are also pickier in usage (and
pricier) than opamps usually.
>From what I can see, this above will rectify everything. With a zener, you
could pass an undisturbed sinewave, with only the peaks being limited past
the zener voltage.
Someone correct me if I'm wrong though. I'm no engineer.
More of a "if it works and doesn't draw too much current, it's probably ok"
school ;-)

Btw, I recently picked up a bunch of NOS TO-5 (metal can) CA3080H OTA's.
If anyone needs some in this round style package, drop me a private email.
:)