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

[harrybissell]

Yeah... I thought you went a little light on the decoupling caps...

H^) harry

(whose guitar hex fuzz has over 200 decoupling caps...  can't use too many eh ???)

patchell wrote:

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