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Old 5th August 2004, 12:47 AM   #1
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Question Guitar Buffer OpAmp Question...

Hi...

I am building a Guitar Buffer for my pedal board and am basically using this schematic...

http://www.freeinfosociety.com/elect...rtonbuffer.gif

with some modifications published in Projects for Guitarists by Craig Anderton. Basically the modifications use dual batteries and have a more filtered output.

What do you recommend I use for the Op Amp? He claims you can use any 741. I was thinking of using a TL071 or TL072 or something like that since they are cheap and generally lower noise.

Any suggestions?

Or Any suggestions on general design?
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Old 5th August 2004, 05:35 PM   #2
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Yes, you should be fine. I believe the TL07x's work well in unity gain applications.

Personally, I wouldn't build it this way. Using 2 batteries is wasteful, since the guitar output is low enough that +/- 4.5 VDC power will do the job, which is how most commercial pedals are designed. I would look for an op amp that is happy at +/- 5VDC power and use 1 battery with a voltage divider circuit.
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Old 19th October 2004, 12:00 AM   #3
amz-fx is offline amz-fx  United States
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Default Re: Guitar Buffer OpAmp Question...

Quote:
Originally posted by Upionics

Or Any suggestions on general design?
Check out my page at http://www.muzique.com/lab/buffers.htm

regards, Jack
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