Oop, speaking of errors, the 2.2K resistor in the schematic of the Peak section of the Peak and Trough circuit, the one between the base of the lower PNP and the input diodes, should be a 220K according to the PCB overlay and the original Serge schematic.
http://www.cgs.synth.net/modules/pic/pcb_cgs84_peakandtrough.gif
http://www.cgs.synth.net/modules/pic/schem_cgs84_peakandtrough.gif
http://www.cgs.synth.net/synth/serge/pic/schem_serge_r3.gif
I'm looking to build one of these with some higher voltage parts for my tube synth. Should be interesting alright... (rationale here is this is an easy way to 'mix down' signals without having to devote the current for several more tube heaters).
_Kyle
http://www.cgs.synth.net/modules/pic/pcb_cgs84_peakandtrough.gif
http://www.cgs.synth.net/modules/pic/schem_cgs84_peakandtrough.gif
http://www.cgs.synth.net/synth/serge/pic/schem_serge_r3.gif
I'm looking to build one of these with some higher voltage parts for my tube synth. Should be interesting alright... (rationale here is this is an easy way to 'mix down' signals without having to devote the current for several more tube heaters).
_Kyle
--- On Mon, 3/26/12, sasami@... <sasami@...> wrote:
From: sasami@... <sasami@...>
Subject: Re: [cgs_synth] CGS48 VCO: Found only 10 diodes on the PCB vs. 12 in the parts list
To: cgs_synth@yahoogroups.com
Date: Monday, March 26, 2012, 2:51 PM
>Hi,
>
>I have two CGS48 Rev1.0 VCOs that I started stuffing today. But when I got
>to the 1N4148 diodes I only found 10 on the PCB while there are 12 in the
parts list
>and schematic.
>
>Am I missing something?
It sounds like you are missing two places to put diodes!
I can only see 10 on the overlay myself, so I guess there is an error in the
parts list.
Ken
__________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
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