Gainclome Volume Control using Log Stepped Attenuator - diyAudio
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Old 5th February 2003, 06:21 PM   #1
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Default Gainclome Volume Control using Log Stepped Attenuator

How can I get a nice volume control out of a 24 step 100K log stepped potentiometer? I am makining a gainclone.

Thanks,
Paul
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Old 5th February 2003, 06:25 PM   #2
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Actually it isnt a setepped potentiometer, rather a stepped attenuator (individual resisitors)
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Old 5th February 2003, 06:27 PM   #3
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What is exactly that you asking for?
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Old 5th February 2003, 06:32 PM   #4
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Just a recomendation on how this would work best and give me a linear volume control (linear sounding).

Most people recomend a linear Pot on the input, and then the center tap to be connected to the 10K resistor. Do I hook it up just like that? Or is there a different way that would work better for a log attenuator.

-Paul Hilgeman
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Old 5th February 2003, 06:36 PM   #5
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Default volume stuff

I don't get it.
Is your stepped control linear or log? And how do you know?

Jan Didden
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Old 5th February 2003, 06:40 PM   #6
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The actual resistance values of the attenuator increase in a logrithmic fasion. I know because that is what it said when I ordered it .
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Old 5th February 2003, 06:46 PM   #7
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http://www.marchandelec.com/att.htm

It is similar to the AT24 on this site, ordered in 100K with a 'logrithmic' scale

Thanks for the quick replies,
Paul Hilgeman
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Old 5th February 2003, 06:46 PM   #8
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Default volume

So, you have a log volume control. That's what you wanted. That's what you ordered. That's what you got. You turn it, each step gives a constant dB attenuation. OK?

Jan Didden
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Old 5th February 2003, 06:48 PM   #9
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Do I simply replace the 100K Linear Tapper found here:

Click the image to open in full size.
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Old 5th February 2003, 07:19 PM   #10
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Default volume

Ah!
The circuit you show needs a linear taper to get log control because the vol control is in the feedback circuit. The best move would be to return the log taper you have and buy a lin taper.
If that is not possible, you could just use the one you got and see if it works OK, chances are it is acceptable.
Else, I don't know any solution barring replacing the resistors on the controls.

Anybody else has some ideas?

Jan Didden
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