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Old 24th March 2005, 04:57 PM   #1
diyAudio Member
Join Date: Mar 2005
Location: kentucky
Default onboard electric guitar/ bass preamp

I found this shcematic on the web.

Can it be used for electric guitar or bass with good results? if so where is the negative of the 9v battery connected?
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Old 24th March 2005, 05:17 PM   #2
johnnyx is offline johnnyx  United Kingdom
diyAudio Member
Join Date: Jan 2004
Location: manchester
The schematic you have shown has a low input impedence, of about 1k. It is unsuitable for guitars but great for moving coil microphones, which is its intended purpose.
For guitars you need a high input impedence and less gain. Look for a non - inverting opamp circuit and you will probably be able to modify it to suit.
The battery negative goes to ground, pin 4 of the opamp. It isn't always shown because everyone knows where it goes.
Hope this helps.
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Old 24th March 2005, 06:33 PM   #3
diyAudio Member
Join Date: Mar 2005
Location: kentucky
That helps.

How bout some help with this one?

Could someone give me a parts list for this?

And maybe a short giude to soldering it up?
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