[sdiy] Group buys: Alpha-style, dual pots, and Joysticks (WAS: RE: Dual-gang reverse-log pot group buy ?)

flightofharmony flight at flightofharmony.com
Mon Nov 17 15:23:55 CET 2008

Hey, if there's enough, I'm up for it!

And, I've actually found much better pricing: 
Song-Huei quoted $0.16 each for 1000. They sent me some samples too, very
nice! Identical to Alpha, except their washers are a much tighter tolerance
so they pretty much stay centered without having to hold them while
tightening the nuts.
Even better, G&H quoted me $0.099 each at 1000 MOQ! Harvestman told me about
them and let me check out a sample - I didn't think to check the washers,
but they are also just like the Alphas in feel and build. They also carry
those Illuminated caseless slide-pots I was hunting.

Dual pots: I've been hunting for affordable concentric-shaft duals, and
finally found some. Top-up has these 9mm duals:
55, and quoted $1.21 each at MOQ 1000. I was planning on getting B100k/B100k
pots for Coarse/Fine control on the upcoming Imp module.

Joysticks: I finally found these people and got a quote! This has been a
long quest, but they are worth it. These are the joysticks I use in the
Infernal Noise Machine (big one on the right):
http://www.flightofharmony.com/images/Stuff/Joysticks.jpg. They have a 90°
arc of travel and are the SMOOTHEST feeling joysticks I have ever used. For
the large, I was quoted $13.10 each for 500 for B100k, no center-return
spring, with knob. The small, same options, is $12.48. The USD is rather
unstable compared to the Yen right now, so the price will fluctuate a bit.
The standard resistance value for the joysticks is B10k. The pots are built
for each model - the large ones have pots that go from 0-->Rmax in 90°, the
smalls in 60°.
I've been drumming up interest in these on Muffwiggler and we're off to a
good start. The plan is to make the purchase in January. 

flight at flightofharmony.com

-> -----Original Message-----
-> From: Andre Majorel [mailto:aym-htnys at teaser.fr]
-> Sent: Monday, November 17, 2008 5:45 AM
-> To: synth-diy at dropmix.xs4all.nl
-> Cc: flightofharmony
-> Subject: Dual-gang reverse-log pot group buy ?
-> Regarding the recent talk of a group buy of Alpha pots...
-> Parametric equalisers often use anti-log pots for the frequency
-> control. Would anybody be interested ?
-> If Kevin orders direct from Alpha, minimum order is one thousand
-> of each reference, meaning we'll be lucky to reach MOQ for *one*
-> value. Here's what the circuits I've seen use :
->   Moog 3-band http://files.muziq.be/schematics/moog_pareq.jpg :
->     100 k dual for each band
->   Rane PE 15 http://rane.com/pdf/old/pe15sch.pdf :
->     100 k dual ("100KE" antilog assumed)
->   Rane PE 17 http://rane.com/pdf/old/pe17sch1.pdf :
->     100 k dual ("100KE" antilog assumed)
->   Speck ASC http://www.speck.com/asc/asc_2.shtml :
->     500 k single for the low band (simulated inductor, peak/shelf)
->      50 k dual   for each mid band
->     500 k single for the high band (simulated inductor, peak)
->   Ethan Winer's SVF http://www.ethanwiner.com/spect-1.gif :
->      50 k dual   for each band (SVF)
-> What would be the best value ? 50 k ? 100 k ?
-> Don't know how much duals cost but the prices Alpha have quoted
-> for singles are pretty good (0.22 USD). At that kind of price, you
-> wouldn't need to stock both singles and duals...
-> No promises, though. This is Kevin's group buy, it's his decision !
-> --
-> André Majorel <URL:http://www.teaser.fr/~amajorel/>

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