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CGS 116 ADSR question

CGS 116 ADSR question

2012-09-22 by Stephen Richards

Hi Ken

I have everything working on the MARSH panel except the ADSR's.

I have installed the transistor marked in red on the build page backwards. I used a BC547 there though not a 2N3565.

Everywhere else that required a 2N3565 , i used a 2N3904 in it's correct orientation.


Everywhere else that required a 2N5089 , i used a 2N3904 in it's correct orientation.


Everywhere else that required a 2N4250 , i used a BC557 in reverse orientation.


I'm getting an led constantly lit at power up.

Could any of this be the problem ?

[Non-text portions of this message have been removed]

Re: CGS 116 ADSR question

2012-09-22 by sasami@hotkey.net.au

>Hi Ken
>
>I have everything working on the MARSH panel except the ADSR's.
>
>I have installed the transistor marked in red on the build page backwards.
I used a BC547 there though not a 2N3565.

If you used a BC547, it needs to be installed the right way around for the
transistor marked in red.

>Everywhere else that required a 2N3565 , i used a 2N3904 in it's correct
orientation.
>
>Everywhere else that required a 2N5089 , i used a 2N3904 in it's correct
orientation.
>
>Everywhere else that required a 2N4250 , i used a BC557 in reverse orientation.

These orientations all seem right to me.

>I'm getting an led constantly lit at power up.
>
>Could any of this be the problem ?

Maybe. The backwards BC547 might be zenering.

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/>

Re: CGS 116 ADSR question

2012-09-22 by Stephen Richards

Could i have cooked them getting them out maybe ?

Would it be worth replacing them ?

Stephen


________________________________
Show quoted textHide quoted text
From: "sasami@..." <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Saturday, September 22, 2012 6:30 PM
Subject: Re: [cgs_synth] CGS 116 ADSR question



>Hi Ken
>
>I have everything working on the MARSH panel except the ADSR's.
>
>I have installed the transistor marked in red on the build page backwards.
I used a BC547 there though not a 2N3565.

If you used a BC547, it needs to be installed the right way around for the
transistor marked in red.

>Everywhere else that required a 2N3565 , i used a 2N3904 in it's correct
orientation.
>
>Everywhere else that required a 2N5089 , i used a 2N3904 in it's correct
orientation.
>
>Everywhere else that required a 2N4250 , i used a BC557 in reverse orientation.

These orientations all seem right to me.

>I'm getting an led constantly lit at power up.
>
>Could any of this be the problem ?

Maybe. The backwards BC547 might be zenering.

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]

Re: CGS 116 ADSR question

2012-09-22 by sasami@hotkey.net.au

>Could i have cooked them getting them out maybe ?

probably not. Just use a multimeter to check them if you are worried.

>Would it be worth replacing them ?

Maybe. It would eliminate the posibility. The down side is constant removal
of parts from the board will start lifting tracks.

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/>

Re: CGS 116 ADSR question

2012-09-22 by Horse Legs

Maybe it's working correctly?

From the CGS page:
"Note that this design is a little unusual in that the Gate input will sit at "ON" when nothing is connected to its jack. "


-TF
Show quoted textHide quoted text
--- In cgs_synth@yahoogroups.com, Stephen Richards <okayjustalittle@...> wrote:
>
> Hi Ken
>
> I have everything working on the MARSH panel except the ADSR's.
>
> I have installed the transistor marked in red on the build page backwards. I used a BC547 there though not a 2N3565.
>
> Everywhere else that required a 2N3565 , i used a 2N3904 in it's correct orientation.
>
>
> Everywhere else that required a 2N5089 , i used a 2N3904 in it's correct orientation.
>
>
> Everywhere else that required a 2N4250 , i used a BC557 in reverse orientation.
>
>
> I'm getting an led constantly lit at power up.
>
> Could any of this be the problem ?
>
> [Non-text portions of this message have been removed]
>

Re: CGS 116 ADSR question

2012-09-22 by Stephen Richards

If you mean the LED being constantly on , i'm assuming that's normal.

I have a feeling the problem is with the orientation of the BC547.

I let you all know when i sort it.


________________________________
Show quoted textHide quoted text
From: Horse Legs <babysealclub@...>
To: cgs_synth@yahoogroups.com
Sent: Saturday, September 22, 2012 11:04 PM
Subject: [cgs_synth] Re: CGS 116 ADSR question



Maybe it's working correctly?

From the CGS page:
"Note that this design is a little unusual in that the Gate input will sit at "ON" when nothing is connected to its jack. "

-TF

--- In cgs_synth@yahoogroups.com, Stephen Richards <okayjustalittle@...> wrote:
>
> Hi Ken
>
> I have everything working on the MARSH panel except the ADSR's.
>
> I have installed the transistor marked in red on the build page backwards. I used a BC547 there though not a 2N3565.
>
> Everywhere else that required a 2N3565 , i used a 2N3904 in it's correct orientation.
>
>
> Everywhere else that required a 2N5089 , i used a 2N3904 in it's correct orientation.
>
>
> Everywhere else that required a 2N4250 , i used a BC557 in reverse orientation.
>
>
> I'm getting an led constantly lit at power up.
>
> Could any of this be the problem ?
>
> [Non-text portions of this message have been removed]
>




[Non-text portions of this message have been removed]

Re: CGS 116 ADSR question

2012-09-22 by Stephen Richards

Hi Ken

Have replaced the BC547 in same orientation as per PCB stencil.
I see now that this is the same as a reversed transistor as the BC547 pinout is opposite to the 2N3565.

Still no function.

Constant LED has stopped , don't know if thats good or bad in this case.

Have checked IC orientations. All correct.

I'm completely stumped.



________________________________
Show quoted textHide quoted text
From: "sasami@..." <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Saturday, September 22, 2012 9:07 PM
Subject: Re: [cgs_synth] CGS 116 ADSR question



>Could i have cooked them getting them out maybe ?

probably not. Just use a multimeter to check them if you are worried.

>Would it be worth replacing them ?

Maybe. It would eliminate the posibility. The down side is constant removal
of parts from the board will start lifting tracks.

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]

Re: CGS 116 ADSR question

2012-09-22 by Stephen Richards

HI Again Ken

I have just noticed that the 51.1K Resistor in the Output section is actually a 51.1 ohm (green, brown , brown , gold , brown).

Do you think this might be the problem here ? I'm going to change it out and make myself a 51.1K


________________________________
Show quoted textHide quoted text
From: Stephen Richards <okayjustalittle@...>
To: "cgs_synth@yahoogroups.com" <cgs_synth@yahoogroups.com>
Sent: Sunday, September 23, 2012 10:43 AM
Subject: Re: [cgs_synth] CGS 116 ADSR question



Hi Ken

Have replaced the BC547 in same orientation as per PCB stencil.
I see now that this is the same as a reversed transistor as the BC547 pinout is opposite to the 2N3565.

Still no function.

Constant LED has stopped , don't know if thats good or bad in this case.

Have checked IC orientations. All correct.

I'm completely stumped.

________________________________
From: "sasami@..." <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Saturday, September 22, 2012 9:07 PM
Subject: Re: [cgs_synth] CGS 116 ADSR question



>Could i have cooked them getting them out maybe ?

probably not. Just use a multimeter to check them if you are worried.

>Would it be worth replacing them ?

Maybe. It would eliminate the posibility. The down side is constant removal
of parts from the board will start lifting tracks.

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]




[Non-text portions of this message have been removed]

Re: CGS 116 ADSR question

2012-09-23 by Stephen Richards

That was it. Stupid mistake !

What a great ADSR !! Can't wait to get further into it.


________________________________
Show quoted textHide quoted text
From: Stephen Richards <okayjustalittle@...>
To: "cgs_synth@yahoogroups.com" <cgs_synth@yahoogroups.com>
Sent: Sunday, September 23, 2012 10:57 AM
Subject: Re: [cgs_synth] CGS 116 ADSR question



HI Again Ken

I have just noticed that the 51.1K Resistor in the Output section is actually a 51.1 ohm (green, brown , brown , gold , brown).

Do you think this might be the problem here ? I'm going to change it out and make myself a 51.1K

________________________________
From: Stephen Richards <okayjustalittle@...>
To: "cgs_synth@yahoogroups.com" <cgs_synth@yahoogroups.com>
Sent: Sunday, September 23, 2012 10:43 AM
Subject: Re: [cgs_synth] CGS 116 ADSR question



Hi Ken

Have replaced the BC547 in same orientation as per PCB stencil.
I see now that this is the same as a reversed transistor as the BC547 pinout is opposite to the 2N3565.

Still no function.

Constant LED has stopped , don't know if thats good or bad in this case.

Have checked IC orientations. All correct.

I'm completely stumped.

________________________________
From: "sasami@..." <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Saturday, September 22, 2012 9:07 PM
Subject: Re: [cgs_synth] CGS 116 ADSR question


>Could i have cooked them getting them out maybe ?

probably not. Just use a multimeter to check them if you are worried.

>Would it be worth replacing them ?

Maybe. It would eliminate the posibility. The down side is constant removal
of parts from the board will start lifting tracks.

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]

[Non-text portions of this message have been removed]




[Non-text portions of this message have been removed]

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