power supply delay: success ! I've recently added Ken Stone's CGS63 power supply delay board toone of my MOTM synth cabinets. I'm happy to report that it hascompletely cured the startup problems I was having with that cabinet.I will be adding the CGS63 to all remaining cabinets and can highlyrecommend it to anyone else who is having power supply startupissues.
I'm posting this message to the MOTM list because I've had a fewMOTM users ask me for a parts list.
Note that the CGS63 will accommodate +/-15V alone, or +/-15V and+5V. I built the full circuit with support for +/-15V and +5V. Here isa Mouser parts list for the full circuit:
Quantity Mouser# Desc.
1 512-1N4002 1N4002 diode
1 512-BC338 NPNtransistor
1 511-UA741CN 741op-amp
8 571-6404456 MTA-156 6-pin header
2 653-G6A-274P-DC12 12V relay
1 72-T20YP-500K 500Ktrimmer
1 291-47K-RC 47kohm resistor
1 291-10K-RC 10kohm resistor
1 291-1M-RC 1Mohm resistor
1 291-100-RC 100ohm resistor (RCO on CGS63)
1 140-XRL25V1.0-RC 1 uF capacitor
If you don't need +5V at all, and you're sure you never will,then use this Mouser parts list:
Quantity Mouser# Desc.
1 512-1N4002 1N4002 diode
1 512-BC338 NPNtransistor
1 511-UA741CN 741op-amp
8 571-6404454 MTA-156 4-pin header
1 653-G6A-274P-DC12 12V relay
1 72-T20YP-500K 500Ktrimmer
1 291-47K-RC 47kohm resistor
1 291-10K-RC 10kohm resistor
1 291-1M-RC 1Mohm resistor
1 291-200-RC 200ohm resistor (RCO on CGS63)
1 140-XRL25V1.0-RC 1 uF capacitor
It is possible to add the +5V support later, but it would be apain to upgrade, so make sure you make the right choice.
For some reason, the 100K trimmer is "obsolete" atMouser. You can use any trimmer from 50K to 1M. I've listed the partnumber for a 500K trimmer, which is what I used.