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Old 03-16-2009, 09:21 PM
sausages sausages is offline
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Default Center Tapped Pots?

Hello,
I'm wondering if anyone knows where I could find a center tapped pot? I need it to build a baxandall tone circuit. I've looked on mouser but didn't seem to find any. Would anyone know where I could find one or possibly a replacement ?

Thanks a lot,
Damien
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Old 03-16-2009, 09:28 PM
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bertus bertus is online now
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Hello,

Do you have the schematic of this baxandall tone control ?
The circuits I know do not need a centre tap potentiometer.
Take a look at this example from ESP. (A little down the page).
http://sound.westhost.com/dwopa2.htm

Greetings,
Bertus
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Old 03-16-2009, 09:30 PM
sausages sausages is offline
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Sorry, I'm reading wireless world but if I read on I could of answered my own question. He goes on to show how it can be done using normal pots. Thanks very much for the site anyway, it'll help witht he diss
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Old 03-16-2009, 09:31 PM
KL7AJ KL7AJ is offline
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Quote:
Originally Posted by sausages View Post
Hello,
I'm wondering if anyone knows where I could find a center tapped pot? I need it to build a baxandall tone circuit. I've looked on mouser but didn't seem to find any. Would anyone know where I could find one or possibly a replacement ?

Thanks a lot,
Damien
Those things are getting to be as rare as chicken lips. About 20 years ago, I had to change the loudness control on my Lafayette receiver, and it was hard to find even back then.

You can "fake" it by building a voltage divider between the two hot legs of the pot and tapping off there. It should be about the same resistance as the full scale pot resistance.

eric
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Old 03-16-2009, 09:38 PM
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I have not seen one in a catalog in years.

Besides Bertus' link, there is this circuit - http://www.zen22142.zen.co.uk/Circuits/Audio/t-ctrl.htm.
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Old 03-16-2009, 09:42 PM
sausages sausages is offline
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Thanks very much for the help and suggestions!
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Old 03-16-2009, 10:14 PM
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Hello,

Here is an other page with all kinds of tone control, including baxandall.
Both passive as active controls are meantioned.
http://www.angelfire.com/electronic/...mp-Tone-A.html

None of them use a centre tap potentiometer.

Greetings,
Bertus
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