[sdiy] Another Vocal filter patch that cracked me up!

[patchell]

    If I were to order a lot of 50 boards, I could probably sell them for about $20.  Selling 50 of these might be difficult.  If I order a smaller lot, they may cost a bit more (but less than $35).

    Yes, all of the parts in the BOM are pretty easy to get (except the CA3280).  Although, you probably should match up a bunch of 2n3906's for the exponential converters, which is a bit of work.  And, as far as I know, Myself and Harry are the only two to have built this board (somebody else
bought the only other one, can't remember who), and it is a lot of work stuffing that board.  Harry knows what it is like now to load 106 power supply bypass caps on one board. :-)

    The CV processing circuits provide for 4 breakpoints / filter section.  I have found that you can do pretty good just using 2 break points.  All of the sample I have posted were all done with two break points.  So, that would potentially remove 12 pots from the front panel (I have 42 total
pots on my module).  Although, this would not remove all that many parts from the PC board, but it does save a bit on panel space.

Seb Francis wrote:

> patchell wrote:
>
> >     I am going to check into the posibility.  I need to take another look at the circuit and make sure there
> > are no changes I want to make.  If that is the case, hopefully, I can reorder it as is without any further
> > tooling charges.  You are aware of how big that thing is don't you (~500 components).
> >
>
> Yes I had a look at the BOM, but (unless I missed something) they all seem cheap and easy to get hold of bits (apart from the CA3280s which are a little bit pricey .. but worth it if the thread of the past couple of days is anything to go by).  Any idea roughly how much the PCB would cost?
>
> I was wondering whether it needs to be quite so big to get that kind of VC-"vowel" effect.  I have no idea really know what configuration of filters would be needed, but I know it sounds very interesting.
>
> Seb
>
> >
> > Seb Francis wrote:
> >
> > > this is an amazing sounding filter.  do you think you will have any PCBs available for sale at any point?
> > >
> > > patchell wrote:
> > >
> > > > http://www.silcom.com/~patchell/synthmodules/vocal2.mp3
> > > >
> > > >     Couldn't resist...
> > > >
> > > > --
> > > >  -Jim
> > > > ------------------------------------------------
> > > > * Visit:http://www.silcom.com/~patchell/
> > > > *-----------------------------------------------
> > > > *I'm sure glad Merry Christmas comes just once a year
> > > > * -Yogi Yorgensen
> > > > ------------------------------------------------
> >
> > --
> >  -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *I'm sure glad Merry Christmas comes just once a year
> > * -Yogi Yorgensen
> > ------------------------------------------------

--
 -Jim
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* Visit:http://www.silcom.com/~patchell/
*-----------------------------------------------
*I'm sure glad Merry Christmas comes just once a year
* -Yogi Yorgensen
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