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12V volt conversion of CGS26 - Analog Logic

12V volt conversion of CGS26 - Analog Logic

2014-03-23 by Stephen Richards

Hi Ken

I need to covert my Analog Logic (and the rest of my BoCGS Panel B modules) to 12V.

Im just going through the build pages for each one.

On the Analog Logic the advice for 12V is to change the 4K7's in the Resistor networks to 2K2's.

Is it just the 4K7's coming of the base of the BC547 and BC557 that i need to change ? Or the the one as coming of the Span Trim as well ?


Re: 12V volt conversion of CGS26 - Analog Logic

2014-03-23 by Jason Nanna

The span trim resistor should stay 4.7k. The goal for that trimmer is to dial in a resistance equal to the ~10k feedback resistor in the adjacent op-amp (unity gain output). Of course, if you don't match the other two 10k resistors in the other inverter to that first 10k, you can only trim one or the other output exactly exactly. But 4.7k puts the adjustment pretty close to the center of the trimmer
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On Sat, Mar 22, 2014 at 9:04 PM, Stephen Richards <okayjustalittle@...> wrote:

Hi Ken

I need to covert my Analog Logic (and the rest of my BoCGS Panel B modules) to 12V.

Im just going through the build pages for each one.

On the Analog Logic the advice for 12V is to change the 4K7's in the Resistor networks to 2K2's.

Is it just the 4K7's coming of the base of the BC547 and BC557 that i need to change ? Or the the one as coming of the Span Trim as well ?



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