Hi Ken
Increased the size of the decoupling caps to 22uf and 220n , it had no effect on signal bleed problem.
Would it be advisable to return these caps to their original values in this case ?
Stephen
________________________________
From: Stephen Richards <okayjustalittle@...>
To: "cgs_synth@yahoogroups.com" <cgs_synth@yahoogroups.com>
Sent: Wednesday, October 19, 2011 1:45 PM
Subject: Re: [cgs_synth] Re: Best of CGS Panel #3 Oscillator signal bleed problem
Thanks , I'll keep the thread posted about how it goes.
Stephen
________________________________
From: "sasami@..." <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Wednesday, October 19, 2011 10:29 AM
Subject: Re: [cgs_synth] Re: Best of CGS Panel #3 Oscillator signal bleed problem
on the rear of the PCB.
and before the Banana Jack for my signal ground ?
The signal ground and 0V need to be connected to each other directly - they
are the same thing.
The "ground" that needs to be separated from them is the mains safety earth,
which grounds things like the core of the transformer, and any metalwork
that could accidentally come into contact with a mains voltage should a wire
come loose, power switch short out, etc..
Also make sure the power wires to your modules are thick enough. There is no
need to go overboard with wire thickness, but too thin can be a problem.
Light signal wire is probably inadequate.
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/>
[Non-text portions of this message have been removed]
Increased the size of the decoupling caps to 22uf and 220n , it had no effect on signal bleed problem.
Would it be advisable to return these caps to their original values in this case ?
Stephen
________________________________
From: Stephen Richards <okayjustalittle@...>
To: "cgs_synth@yahoogroups.com" <cgs_synth@yahoogroups.com>
Sent: Wednesday, October 19, 2011 1:45 PM
Subject: Re: [cgs_synth] Re: Best of CGS Panel #3 Oscillator signal bleed problem
Thanks , I'll keep the thread posted about how it goes.
Stephen
________________________________
From: "sasami@..." <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Wednesday, October 19, 2011 10:29 AM
Subject: Re: [cgs_synth] Re: Best of CGS Panel #3 Oscillator signal bleed problem
>Hi Kenmy Power Supply , sorry.
>
>This thread has got a bit bogged down in talking about Earth Connections in
>Caps value.
>Getting back to my original query...you suggested increasing the Decoupling
>Yes. Try putting 22uF or 47uF instead of the 10uF, and add 100n across each
>We are talking about the 10uf 35V x2 and the 100n x2 on each Oscillator , yes ?
on the rear of the PCB.
>Also , your suggestion for the 1K 1 watt resistor for the Signal ground ;would i install this between the 0V out of the 15V side of my Power Module
and before the Banana Jack for my signal ground ?
The signal ground and 0V need to be connected to each other directly - they
are the same thing.
The "ground" that needs to be separated from them is the mains safety earth,
which grounds things like the core of the transformer, and any metalwork
that could accidentally come into contact with a mains voltage should a wire
come loose, power switch short out, etc..
Also make sure the power wires to your modules are thick enough. There is no
need to go overboard with wire thickness, but too thin can be a problem.
Light signal wire is probably inadequate.
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/>
[Non-text portions of this message have been removed]