The only critical caps in the Steiner VCF are the caps for the
integrator/filter sections, the 2N2s. For mine I am ordering some
Polystyrene, 2200 pF, radial caps from Mouser, part number 23PW222. These
are high stability, low temperature coefficient, 5% tolerance caps.
You can always use a higher rated capacitor voltage rating than listed.
Most caps in CGS designs are decoupling or simple RC circuits for generating
triggers or delays. For those I generally use the cheapest cap available
with the proper pin spacing. For the standard 100N decoupling cap I've been
using Mouser part number 80-C322C104M5U. These are only 11 cents each in
quantities of 25 or more.
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com
integrator/filter sections, the 2N2s. For mine I am ordering some
Polystyrene, 2200 pF, radial caps from Mouser, part number 23PW222. These
are high stability, low temperature coefficient, 5% tolerance caps.
You can always use a higher rated capacitor voltage rating than listed.
Most caps in CGS designs are decoupling or simple RC circuits for generating
triggers or delays. For those I generally use the cheapest cap available
with the proper pin spacing. For the standard 100N decoupling cap I've been
using Mouser part number 80-C322C104M5U. These are only 11 cents each in
quantities of 25 or more.
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com
> -----Original Message-----
> From: eblakesmith [mailto:hoggfatt@...]
> Sent: Saturday, December 27, 2003 7:18 PM
> To: cgs_synth@yahoogroups.com
> Subject: [cgs_synth] capacitor choices
>
> Hi there,
>
> I'm attempting to put together my first project (the steiner vcf) and
> am somewhat confused about capacitors and which ones to
> use. Beyond the values listed for the circuit I'm wondering if it
> makes any difference the type of capacitor used (ceramic,
> electrolytic, etc). Also some of the capacitors required are listed
> as 25v and 35v in addition to the capacitance values so I'm
> wondering if this means the caps have to be those values or
> higher or specifically those values. My apologies if these are
> dumb questions. Thanks in advance for any advice.
>
>
> See the following URLS for the CGS Modular Synth home page:
> Main: http://www.cgs.synth.net/
> Secondary: http://otherunicorn.0catch.com/synth/
>