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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
CGS60
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Kartoshka



Joined: Jan 13, 2008
Posts: 28
Location: Toronto, Canada

PostPosted: Wed Jul 16, 2008 3:37 pm    Post subject: CGS60 Reply with quote  Mark this post and the followings unread

A question regarding Stomp Box Adapter input voltage: will it work on 9v instead of 15V, along other tonepad fx pedal boards ...which are all still to be built? Surprised
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andrewF



Joined: Dec 29, 2006
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Location: australia
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PostPosted: Wed Jul 16, 2008 4:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

The TL071, in the circuit, requires +/-15V (or +/-12V). There isn't really an easy way around this, I guess thats why CGS46 has a built in PSU.
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Luka



Joined: Jun 29, 2007
Posts: 1003
Location: Melb.

PostPosted: Wed Jul 16, 2008 5:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

couldnt you just split off and add some more regulators to drop the current down to 9v, while keeping the preamp running at 12/15V.
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Kartoshka



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PostPosted: Thu Jul 17, 2008 2:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

good point indeed. thanks guys!
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Sine



Joined: Sep 10, 2007
Posts: 111
Location: Netherlands

PostPosted: Fri Jul 18, 2008 4:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

andrewF wrote:
The TL071, in the circuit, requires +/-15V (or +/-12V). There isn't really an easy way around this, I guess thats why CGS46 has a built in PSU.


A TL071 wil happily run on +-9V, only it's output swing wil be proportionally lower.
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