[sdiy] Crumar DS-2 Issues....

[Bob Weigel]

I'm still waiting for schematics from a member to solve an issue with my 
DS-1's glide that doesn't work.  That...sounds like it would be a 
calibration issue possibly though.  Generally on synths with digital 
control stuff going on, knobs are read by digital scanning/conversion.  
I'm not sure how it is set up on these.  Hope to get those some day 
soon.  I used my DS-1 the other night at a gig.  They are just a cool 
keyboard.  What a great sounding mono synth. I'll post information on my 
page

cu.imt.net/~sounddoctorin

in the global synth section as always when I get a chance to do a 
technical survey of the circuit and at that time you might want to ask 
again if you haven't gotten an answer yet. -Bob

SealsCrofts 1 9 7 5 wrote:

>Hi all
> 
>My friend has a 1978 Crumar DS-2. There is one
>specific problem Id like to address. It has to do
>with the potentiometers. It's crazy, but they aren't
>linear. They wont do anything until they are set at
>about "9" (out of 10). If the knob is set anywhere
>from 1-8, nothing will happened. The entire values of
>1-10 are crammed the space of 9-10, making it very
>sensitive to adjust things. This problem seems to
>happen with the LFO knobs, and a few others. 
>
>It's kind of a tricky problem to explain, but I
>wondered if anyone else noticed this with the DS-2?
>Would a simple callibration fix the problem? I dont
>have the schematics, but I can probably find them. 
>
>thanks, 
>jonn
>
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