[sdiy] The best types of capacitors to use when designing a VCF

[ColinMuirDorward]

I did a kind of blind test between c0g vs wima polypropylene, in a 2164
based 2pole SVF, and the wimas won. In other circuits, like the ms20 VCF
for eg, I think it mattered less if at all.

In hifi mastering type units it’s definitely a thing to use wima for
filtering. I think they look good on the board and are easy to spot (for
the glam shots) and are known to sound good, so probably a good choice.

I’m presently using an APB spectra console which has a rep for very good
channel EQs (I agree). The board is all SMD so would probably be c0g there.

C0g is such a good option when you can have the robot place it, if that’s
your jam.

Just my subjective 2 cents!


On Sat, Sep 24, 2022 at 4:53 PM David G Dixon via Synth-diy <
synth-diy at synth-diy.org> wrote:

> I use silvered mica for VCOs and VCFs, typically 390pF or 500pF.  They
> work very well.  They are typically big brown things that are kinda lumpy.
>
> You have to be careful with some types of caps, such as polystyrene,
> because they are easily damaged or destroyed when soldering.  Not sure
> about polypropylene.  Silvered mica and metallized polyester are pretty
> forgiving.
>
> ------------------------------
> *From:* Synth-diy [mailto:synth-diy-bounces at synth-diy.org] *On Behalf Of *Mike
> Bryant
> *Sent:* Saturday, September 24, 2022 3:37 PM
> *To:* prowlerraven32 at hotmail.com
> *Cc:* synth-diy at synth-diy.org
> *Subject:* Re: [sdiy] The best types of capacitors to use when designing
> a VCF
>
> [*CAUTION:* Non-UBC Email]
>
>
>
>
>
> If you can afford them then polypropylene are the very best you can get
> for pro-audio.   But a good metallised polyester isn’t far behind.
>
>
>
> That said, for many products automotive quality SMD ceramics (the ones
> with the anti-vibration mountings that kill microphony) are more than good
> enough.
>
>
>
> There’s a whole chapter on choosing components like this in Douglas Self’s
> book which it is well worth buying a copy of.
>
>
>
>
>
>
>
> *From:* Synth-diy [mailto:synth-diy-bounces at synth-diy.org] *On Behalf Of *Logan
> Mitchell Sr via Synth-diy
> *Sent:* 24 September 2022 23:12
> *To:* Synth-diy at synth-diy.org
> *Subject:* [sdiy] The best types of capacitors to use when designing a VCF
>
>
>
> Hello.
>
>
>
> Can anyone tell me what are the best types of capacitors to use when
> designing a VCF ?
>
>
>
> Logan
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