[sdiy] Max Filter Cutoff

[David G Dixon]

I have always used 200 or 220pA caps in all my filters -- I bought a stash
of 200pA silvered mica caps from a local store (which were great, but we
both ran out of them), and now often use 220pF C0G ceramics.  The max cutoff
is well above 20kHz.  I would guess it's as high as 30 or 35kHz.
 
  _____  

From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of
Jacob Watters
Sent: Sunday, October 23, 2016 9:48 AM
To: synthdiy diy
Subject: [sdiy] Max Filter Cutoff



I am working on a filter and I was trying to get the maximum cutoff up to
20kHz. I found that I needed much smaller caps than what is usually used in
most filters. 

Then I noticed that on the Arp 2600 the max filter cutoff is labelled as
10kHz.

What is the normal max cutoff for a 4-pole -24dB analog filter?

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