[sdiy] VCF caps in modern synths

[David G Dixon]

We learned at Intellijel back in the day that polyester film caps will
oscillate when ceramic caps won't.  The WIMA brick-red ones are especially
good.
 
I have taken to using silvered mica caps in both my VCOs and VCFs for the
audio-range caps, and polyester film for the LFO-range caps.  These seem to
work very well.  Typically, I use 390pF in VCOs and 220pF in VCFs for
audio-range, and 100x that for LFO range.

  _____  

From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
ColinMuirDorward
Sent: Tuesday, March 23, 2021 1:47 PM
To: Gordonjcp
Cc: *SYNTH DIY
Subject: Re: [sdiy] VCF caps in modern synths


[CAUTION: Non-UBC Email]	
>> Interesting.  So are they selling a special version for the coke-addled
audiophools who reckon that they can hear the difference between
through-hole and SMD components? 


I don't think it's a question of through-hole vs SMD. It's more like
ceramics vs something else (film, in this case). It *is* interesting,
though. Behri never advertised this capacitor change AFAIK, so I wonder if
maybe they just weren't entirely sure which to use yet. Personally, I've
never found a filter where yellow, box/film sounded better than C0Gs. If I
decide it's worth voiding the warranty, I would try polypropylene in mine,
if only because it's an easy change.


On Tue, Mar 23, 2021 at 7:32 PM Gordonjcp <gordonjcp at gjcp.net> wrote:


On Tue, Mar 23, 2021 at 03:15:53PM -0400, ColinMuirDorward wrote:
> Here is a little update to this topic.
> Some good people at GS have photographed the VCF section on two behri 2600
> versions: orange/black and grey.
> You can see that in orange, they used SMD ceramics, and on grey, yellow
box
> film.
> Lucky for us, the orange version has empty through-hole footprints!
>
https://www.gearslutz.com/board/attachments/electronic-music-instruments-and
-electronic-music-production/953304d1616358816-behringer-2600-a-2600vs2600.j
pg

Interesting.  So are they selling a special version for the coke-addled
audiophools who reckon that they can hear the difference between
through-hole and SMD components?

-- 
Gordonjcp

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