Signal ground and pot

Scribble · 4th November 2004, 01:01 PM

Ok need to brush up on my principles here.

Can some one explain to me why the signal ground must be connected to one leg of the potentiometer and then to the start ground?

psychosteve · 4th November 2004, 01:11 PM

because it sets the input impedance of the amp, by running the signal + to - across the full value of the pot.

hope that helps, steve.. ..

audioPT · 4th November 2004, 03:31 PM

And helps to avoid ground loops

Scribble · 5th November 2004, 02:05 AM

Cheers for your great help fella's

4th November 2004, 01:01 PM	#1
Scribble diyAudio Member Join Date: Dec 2002 Location: Western Australia	Signal ground and pot Ok need to brush up on my principles here. Can some one explain to me why the signal ground must be connected to one leg of the potentiometer and then to the start ground?

4th November 2004, 01:11 PM	#2
psychosteve diyAudio Member Join Date: Sep 2004 Location: coventry england	because it sets the input impedance of the amp, by running the signal + to - across the full value of the pot. hope that helps, steve.. .. __________________ you all laugh because im different, i laugh because youre all the same.. ..

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4th November 2004, 03:31 PM	#3
audioPT diyAudio Member Join Date: Aug 2002 Location: Right here	And helps to avoid ground loops

5th November 2004, 02:05 AM	#4
Scribble diyAudio Member Join Date: Dec 2002 Location: Western Australia	Cheers for your great help fella's

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