Dynamic Mic to Guitar pedal converter - This needs settled!

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Dynamic Mic to Guitar pedal converter - This needs settled!

Postby fishfude » 26 May 2014, 17:00

Hi Folks,

So I've been asked by a friend to create them a Dynamic Mic to guitar pedal converter. I've been reading up online and there seems to be a consensus that this isn't worth your while bothering with!? Also, there doesn't seem to be an agreed decent schematic for doing it.

I believe the two issues are converting from low impedance to high(er) impedance and then boosting the signal. Surely this is very straight forward. My thought was simply to have an opamp with a pot as the feedback resistor to boost the signal? I assume I'm missing something (as always, that's how I learn!).

Here's the schematic I found:

Image

This should be easy to convert to single supply right, and I just swap out the 100k feedback for an A500k pot for amplification?

Thanks,

ff
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Re: Dynamic Mic to Guitar pedal converter - This needs settl

Postby grrrunge » 26 May 2014, 22:21

You might as well build a proper mic preamp (like this one for example: http://sound.westhost.com/project66.htm), and add an attennuation pot at the end. I built an API-312 style preamp in a box with a switchable fx-loop a while back, for a vocalist who wanted to build a pedal board for live vocals... It's most certainly possible!
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Re: Dynamic Mic to Guitar pedal converter - This needs settl

Postby fishfude » 27 May 2014, 12:35

Thanks. I posted the same thread on the other forum and ti just lead to more confussion. I think this is the answer I was lookin for.

ff
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Re: Dynamic Mic to Guitar pedal converter - This needs settl

Postby fishfude » 27 May 2014, 12:44

I that preamp for example, how do you deal with going from the balanced output of the mic cable to the unbalanced input (or say a guitar pedal)? Do you just tie the + and - output together?

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ff
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Re: Dynamic Mic to Guitar pedal converter - This needs settl

Postby grrrunge » 27 May 2014, 16:48

The output of the preamp is not differential but single ended. You've got balanced in, unbalanced out.
Out goes to tip of the output jack. Sleeve of the output jack just goes to gnd as usual.
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Re: Dynamic Mic to Guitar pedal converter - This needs settl

Postby dai h. » 28 May 2014, 04:21

wouldn't it be so much easier just to buy a preamp or mixer (esp. at the prices you can get them for these days)? (Or a good used one for even less than new.) I mean if you are dead set on DIY, that's cool, but it seems a poor cost vs. benefit scenario.
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Re: Dynamic Mic to Guitar pedal converter - This needs settl

Postby grrrunge » 28 May 2014, 06:58

I second that - unless you want the sound of API or Neve gear, from which you can DIY close and excellent sounding units for a fraction of the price.
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