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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Change WSG Pot Values
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PeterF



Joined: Jul 03, 2010
Posts: 11
Location: Germany
PostPosted: Sat Jul 03, 2010 10:01 am    Post subject: Change WSG Pot Values Reply with quote  Mark this post and the followings unread
Hello Folks!
Since i cant the the right potentiometer value i thought of changeing them.
But then i took a good look at the Schematic and i think i cant replace the 1M and 500K Pots with 100K Pots since they are a part of the oscillating circuit, right?

Greetings,
Peter
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Danno Gee Ray



Joined: Sep 25, 2005
Posts: 1351
Location: Telford, PA USA
PostPosted: Sat Jul 03, 2010 1:24 pm    Post subject: Reply with quote  Mark this post and the followings unread
If you were to use 100k you would likely lose a significant portion of the functioality or range of control, if they would work at all. The listed pots are highly recommended.
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PeterF



Joined: Jul 03, 2010
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Location: Germany
PostPosted: Sat Jul 03, 2010 1:55 pm    Post subject: Reply with quote  Mark this post and the followings unread
.
Last edited by PeterF on Sat Jul 03, 2010 1:56 pm; edited 1 time in total
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PeterF



Joined: Jul 03, 2010
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Location: Germany
PostPosted: Sat Jul 03, 2010 1:56 pm    Post subject: Reply with quote  Mark this post and the followings unread
Danno Gee Ray wrote:
If you were to use 100k you would likely lose a significant portion of the functioality or range of control, if they would work at all. The listed pots are highly recommended.


Hello and thanks for the Reply!
Thats what i tought...
Guess i will have to abandon the project in this form then. I cant get PCB mount pots with vertical alignment with that value.

Wanted to make a single PCB with everything on it, because i hate the Wiring.

Greetings,
Peter
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Danno Gee Ray



Joined: Sep 25, 2005
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Location: Telford, PA USA
PostPosted: Sat Jul 03, 2010 6:48 pm    Post subject: Reply with quote  Mark this post and the followings unread
You could use 2n5457's as shown on Ray's website in the mods section, and then feed them with CV's from 100K pots. Kind of redundant, but might work for ya.
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RF



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PostPosted: Sat Jul 03, 2010 8:33 pm    Post subject: Reply with quote  Mark this post and the followings unread
I'm of the opinion that you use what you got - and see what happens. Experimentation is part of the fun....

Build it!
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Uncle Krunkus
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PostPosted: Sat Jul 03, 2010 8:57 pm    Post subject: Reply with quote  Mark this post and the followings unread
Yeah, I agree with RF.
The R/C ratios for the oscillators are just that. You get a certain frequency range for a certain pot/capacitor value. (I think it's something like 2pi*R*C) So if you make the pot 1/10th the value, just make the cap 10* the value. If the only pot you have is twice the size, halve the value for the cap.
It's not as simple as that on the filter, but the components hanging off the 40106 are very tweakable. Very Happy
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Danno Gee Ray



Joined: Sep 25, 2005
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Location: Telford, PA USA
PostPosted: Sun Jul 04, 2010 8:11 am    Post subject: Reply with quote  Mark this post and the followings unread
Good points!
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PeterF



Joined: Jul 03, 2010
Posts: 11
Location: Germany
PostPosted: Wed Jul 07, 2010 3:36 am    Post subject: Reply with quote  Mark this post and the followings unread
Uncle Krunkus wrote:
Yeah, I agree with RF.
The R/C ratios for the oscillators are just that. You get a certain frequency range for a certain pot/capacitor value. (I think it's something like 2pi*R*C) So if you make the pot 1/10th the value, just make the cap 10* the value. If the only pot you have is twice the size, halve the value for the cap.
It's not as simple as that on the filter, but the components hanging off the 40106 are very tweakable. Very Happy


Thank you and the others for the Replys!
That makes sense, at the moment im on a steep learning curve with analog electronis Smile

As soon as i got my Hands on the Parts i will start building, im hunting for cheap bulk pots at the moment Cool

Everything else should be allready in my parts drawer ^^
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