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Anyone have the Small Stone schematic with three LM13600 chips?

Started by analogmike, October 13, 2005, 06:57:15 PM

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analogmike

October 13, 2005, 06:57:15 PM
HI,

I have one of these, EH Small Stone with three LM13600 chips, has just one transistor. 1978, model EH4801C (says EH4800 on outside like the more common issue J). Anyone have the schematic?

thanks!

DIY has unpleasant realities, such as that an operating soldering iron has two ends differing markedly in the degree of comfort with which they can be grasped. - J. Smith

mike  ~^v^~ aNaLoG.MaN ~^v^~   vintage guitar effects

http://www.analogman.com

A.S.P.

#1
October 14, 2005, 01:38:19 AM Last Edit: July 31, 2006, 01:54:37 PM by A.S.P.
information lost...
Analogue Signal Processing

Coriolis

#2
October 14, 2005, 05:53:34 AM
Huh? That's new to me...
But isn't the 13600 a dual OTA with a transistor buffer, just like the CA3094 ? Or is the last one only a single OTA?

Sorry if I'm off topic here...never mind me!
Confused...

C
Check out some free drum loops and other sounds at my site: http://www.christiancoriolis.com

StephenGiles

#3
October 14, 2005, 08:29:51 AM
Of course I have the circuit for this!!!!
http://img.photobucket.com/albums/v517/uncle_boko/EHsmallst2.jpg
Stephen
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

analogmike

#4
October 14, 2005, 09:09:15 AM
Stephen,

THat's the one, thank you!!!

(I meant one LM324 and two LM13600 chips)


DIY has unpleasant realities, such as that an operating soldering iron has two ends differing markedly in the degree of comfort with which they can be grasped. - J. Smith

mike  ~^v^~ aNaLoG.MaN ~^v^~   vintage guitar effects

http://www.analogman.com

Arn C.

#5
October 14, 2005, 09:58:30 AM
Thanks Stephen!

I also was looking for that too!  Don't happen to have a layout available?  I know I am reaching here!

Peace!
Arn C.

puretube

#6
October 14, 2005, 10:29:55 AM
Mike/Stephen:
here`s wondering why there`s no obvious "positive half" of the bias-voltage-divider (negative half = 12k/33µ, located in the pic between P.S. & LFO) to be seen.

Is the bias being obtained through the linearizing diodes & the 4x 10k +3k9 / 33µ, located on top of the pic,
or is there a resistor missing in the schem?
:icon_question:
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