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 Forum index » DIY Hardware and Software » fonik's place
ps3100 V1.0 pcb (no lfo)
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warpboy



Joined: Jun 09, 2010
Posts: 18
Location: paris

PostPosted: Sat Sep 10, 2011 4:49 am    Post subject: ps3100 V1.0 pcb (no lfo)
Subject description: doesn't work
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hello,
I'm building the first version pcb designed by Fonik (no lfo).
At this time it doesn't work correctly.
. small problem : less sound when the mix pot is full wet (it may be a resistor value problem, but other problem :I have the same sound wet or dry...)

it doesn't change anything when I turn each of the 3 resonators pots (with a signal cv, square,sine or any other type).

I have to adjust the 3 trimmers, but what is the voltage required at the output of each trimmers. is this a critical parameter?


I'm triyng to understand how works the circuitry :
CV input---->bc550+bc560--->vactrol vtl5c3/2
it could help be in debugging the board.

thank you by advance
Warpboy
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fonik



Joined: Jun 07, 2006
Posts: 3759
Location: Germany
Audio files: 23

PostPosted: Sat Sep 10, 2011 9:35 am    Post subject: Reply with quote  Mark this post and the followings unread

is it hte single sided layout for self etching?
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cheers,
matthias
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warpboy



Joined: Jun 09, 2010
Posts: 18
Location: paris

PostPosted: Sun Sep 11, 2011 6:31 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello Fonik,
yes it's a single side pcb with a brigde to add between R24 & R27.
I've joined the schematic.
I'd like to understand how works the vactrols in order to measure at there outputs (voltage,current?) because it seems that when the signal is wet, it's the same that the original just at a smaller level...

I have an oscilloscope and a multimeter....should be usefull, but I don't wich points I had to look at.

All Ic's voltages (+15/-15) are ok.

Thank you


schem resonators.jpg
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warpboy



Joined: Jun 09, 2010
Posts: 18
Location: paris

PostPosted: Mon Sep 12, 2011 12:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

hello,
finally it works...
I've found 2 mistakes R9,R10 in parts list 270K and 10K in the schematic. the right value is 10K ( I've looked at the V4 resonator with lfo schematic)
I have added a wire between the cathodes of the second and third vactrols and 0V...

and it works Cool
just a question : how can I adjust the 3 trimmers ?

Thank you
Fabien
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fonik



Joined: Jun 07, 2006
Posts: 3759
Location: Germany
Audio files: 23

PostPosted: Mon Sep 12, 2011 11:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

warpboy wrote:
hello,
finally it works...
I've found 2 mistakes R9,R10 in parts list 270K and 10K in the schematic. the right value is 10K ( I've looked at the V4 resonator with lfo schematic)
I have added a wire between the cathodes of the second and third vactrols and 0V...

and it works Cool
just a question : how can I adjust the 3 trimmers ?

Thank you
Fabien

glad you solved the problem yourself.

from what you are saying i understand that the BOM is wrong AND that there are traces missing on the layout (cathodes to GND)? sorry for that. i wonder how i did built mine back then? Laughing
anyways, sorry for the inconvenience. i am glad you got it working now.

BTW i set the trimmers on my units so that the LEDs are off with no CV applied and with potentiometer fully CCW.

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cheers,
matthias
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warpboy



Joined: Jun 09, 2010
Posts: 18
Location: paris

PostPosted: Tue Sep 13, 2011 12:15 am    Post subject: Reply with quote  Mark this post and the followings unread

hello,


thank you Fonik, I'll adjust the trimmers today.

Quote:
from what you are saying i understand that the BOM is wrong AND that there are traces missing on the layout (cathodes to GND)? sorry for that. i wonder how i did built mine back then?
anyways, sorry for the inconvenience. i am glad you got it working now.


that's exactly.... as soon as I 'll have time, I'll post a picture with modifications...


for the rest : Thank you guy !!!!!! resonators are so nice.....


Warpboy
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fonik



Joined: Jun 07, 2006
Posts: 3759
Location: Germany
Audio files: 23

PostPosted: Tue Sep 13, 2011 12:41 am    Post subject: Reply with quote  Mark this post and the followings unread

warpboy wrote:
Quote:
from what you are saying i understand that the BOM is wrong AND that there are traces missing on the layout (cathodes to GND)? sorry for that. i wonder how i did built mine back then?

that's exactly.... as soon. as I 'll have time, I'll post a picture with modifications...

this would be more than nice. would you mind if i uploaded this picture to my site then?

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cheers,
matthias
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warpboy



Joined: Jun 09, 2010
Posts: 18
Location: paris

PostPosted: Thu Sep 15, 2011 12:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello,
here is a copy of the parts placement with 2 modifications.
I've built the LPG too, really nice, it's a piece to built Cool

Thank you Fonik Wink


resonator V1 mods.pdf
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fonik



Joined: Jun 07, 2006
Posts: 3759
Location: Germany
Audio files: 23

PostPosted: Fri Sep 16, 2011 12:26 am    Post subject: Reply with quote  Mark this post and the followings unread

warpboy wrote:
Hello,
here is a copy of the parts placement with 2 modifications.
I've built the LPG too, really nice, it's a piece to built Cool

Thank you Fonik Wink

great! thank you very much. i just uploaded your info to my site...

_________________
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cheers,
matthias
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