Cgs synth

For what it's worth, the original design I referred to when designing this
specified the SCL4006AE. So apparently an A series should work. Note: SCL
chips by SSS (Solid State Scientific) were deemed to be disasters by
industry many years back.

Suggestions
#1. Increase the 10k pulldown on pin 3 of the 4006 to 100k.
#2. Increase the 33k, 18k divider to 100k, 47k.
#3. Try a 4070 instead of a 4030.
#4. An AE series chip is very prone to static damage, and is no doubt OLD.

Ken

>I came across the message below in the list archives. Was this ever
>resolved? I'm having the exact same problem with my CD4006AE's and I
>am using the CGS PCB. Moreover, I have breadboarded the Transcendent
>noise source with these chips earlier and that also had the VCO at the
>output.
>
>Or, does anyone have a working digital noise with an A-series 4006?
>
>
>> I've never tried an A series (unbuffered) in there, though I don't
>see why
>> it shouldn't work. Possible problems 1) MC4006 - it isn't a 4006!
>you'd want
>> MC14006. 2) wiring error. 3) timing issues between the chosen chips.
>>
>> Ken
>>
>> >Is there a rpoblem with using the series A 4006 in the Digital Noise
>> >circuit? My breadboard proto isn't making noise, but rather it's
>> >halving the output frequency of the VCO.
>> >
>> >Chub
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>

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Ken Stone sasami@...
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