| linuxenthusiast |
I'm somewhat new to preamps (actually DIY electronics in general) but I've searched the net high and low for a schematic to build a simple preamp with an input for a guitar and a line level output. Either I don't recognize it when I see it or is this not normally done?
I'm expiramenting with (actually trying to design from scratch) a piano pickup and I need a box witth 6 preamp inputs which will then go to line level so I can work with it from there. I have the schematics everything else, I just need the preamp stage. |
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| sreten |
Hi,
Perhaps you've got no answer because all pre-amps have line level outputs.
What level is line level depends on the circumstances, home hi-fi,
semi-proffessional equipment and full professional equipment.
:)/sreten. |
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| linuxenthusiast |
Thanks for clarifying that for me sreten,
basically it would go to like an AUX input on a home stereo.
I tried this one once...
http://www.till.com/articles/GuitarPreamp/
...and I could barely hear anything, like it needed more gain. |
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| mrshow4u |
| I just simulated that "guitar preamp" circuit. It almost amounts to a buffer, with less than 1 dB of voltage gain. That circuits description is misleading, I'd say. No wonder it sounded quiet. I was able to get 7 dB of gain by reducing the 2.2kohm resistor to 30 ohms and changing the 6.8 kohm resistor to 10kohms. Using an op-amp might be the quickest way to get you to large gain. Try an LF-353. It's got a JFET input. ...good for high impedance sources (i.e. guitar) |
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| linuxenthusiast |
| Thanks mrshow4u, I'll give that a try. |
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| sreten |
http://www.till.com/articles/PreampCable/index.html
Hi,
The above is the basis of the circuit and its not a pre-amp, it is
in effect a buffer, allowing a guitar to use long cables without
losing top-end. It has high power gain (allowing low impedance
loading) but low voltage gain - which is nowhere near enough.
It is designed to work into a guitar level input, so not a pre-amp.
Any more normal guitar pre-amp circuit will work into your AUX.
:)/sreten. |
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