[sdiy] VCF caps in modern synths

[Peter Pearson]

Volume discounts from the fab?  I think Behringer is the fab, no?  Last I
checked they own a whole city in China:

https://www.musicradar.com/news/behringers-mindblowing-new-factory-is-also-a-city

On Tue, Mar 23, 2021 at 10:07 PM Michael E Caloroso <
mec.forumreader at gmail.com> wrote:

> "I'm going to guess that these PCB were made to handle both so that
> volume discounts on the board fab could be obtained."
>
> Another guess is to resolve supply issues.  If one is out of stock,
> the other can be substituted without halting production.
>
> MC
>
> On 3/23/21, Brian Willoughby <brianw at audiobanshee.com> wrote:
> >
> >
> > On Mar 23, 2021, at 16:28, Gordonjcp 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.jpg
> >>
> >> 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?
> >
> > Not every capacitor formulation is available in all package variations.
> >
> > I happen to prefer SMD - not for sound but for convenience of
> manufacturing.
> > However, certain kinds of capacitors that are ideal for Sample and Hold
> > simply aren't available in SMD, so my PCB designs include placements for
> > both through-hole and SMD. This way, I can try out the cheaper C0G to
> see if
> > they hold as good as I need for the S&H refresh timing that I can
> achieve.
> >
> > I'm going to guess that these PCB were made to handle both so that volume
> > discounts on the board fab could be obtained. Then, if a particular
> filter
> > needs through-hole it's available.
> >
> > Brian
> >
> >
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