[sdiy] Knobs/pots/jacks suggestions

[Jonathan Lutz]

So, any suggestions on good 1/8" jacks? :)

JON

On 5/16/05, Tim Parkhurst <tparkhurst at siliconbandwidth.com> wrote:
> Hi Peter,
> 
> In my experience as a mechanical designer, I've seen three main factors that
> determine the price of a part:
> 
> 1) The quantities involved. This is listed first because it has a HUGE
> bearing on the price of a part. You can get something like a 1GB USB memory
> 'flash disk' for well under $100 because of the massive quantities involved.
> We recently competed for a bid of designing and manufacturing a similar
> part, and the customer wanted pricing for quantities of 200,000 pieces a
> MONTH to start, and this was to ramp up to 1 MILLION PIECES A MONTH over the
> period of about a year. At these quantities, the price for a single stamped
> metal part went from about twenty cents to less than half a penny.
> 
> 2) The manufacturer's willingness to make the part. A manufacturer who is
> 'hungry' or who thinks the part will be a good long-term investment will be
> much more willing to bid competitively. I've had quotes from local machine
> shops vary by a factor of 4 to 1. The reason? A very busy shop will often
> give an outrageously high quote rather than a 'no bid.'
> 
> 3) Manufacturability. The ease of making the part. This has some bearing on
> the part price, but it is far from the most important driving factor. I
> pride myself in keeping 'DFM' (Design for Manufacturability) in mind when
> designing parts, but the lure of high potential profits will often make a
> vendor willing to undertake a more difficult design.
> 
> Just my $US0.02
> 
> Tim (a more difficult part) Servo
> 
> "Imagination is more important than knowledge." - Albert Einstein
> 
> ********************************************
> 
> 
> > -----Original Message-----
> > From: Peter Grenader [mailto:peter at buzzclick-music.com]
> > Sent: Monday, May 16, 2005 11:31 AM
> > To: Christopher Randall; synth-diy at dropmix.xs4all.nl
> > Subject: Re: [sdiy] Knobs/pots/jacks suggestions
> >
> > Sorry, but  I've never understood the price of knobs in general, but
> > especially these things.  The Rean soft touch, the ones I use are no less
> > complicated (requires two moldings instead of one, although they are push
> > one so there's no threaded insert or lock screw) - they only run 48 cents
> > each at a quantity of 1.
> >
> >
> >  iChristopher Randall wrote:
> >
> > >
> > > On May 16, 2005, at 12:29 AM, James Patchell wrote:
> > >
> > >> My favorite knob... Davies 1900H....Status....seemingly unobtainable
> > >> :-(
> > >
> > >
> > > Allied has 1113 in stock as of today. They're $2-something a whack,
> > > though.
> > >
> > > http://www.alliedelec.com/cart/ProductDetail.asp?SKU=543
> > > -0400&SEARCH=Davies+knob&ID=&DESC=1900H
> > >
> > > Chris Randall
> > > http://www.analogindustries.com
> > >
> > >
> >
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