Re: gEDA-user: Signal Source Setup for Electric Guitar?

[Michael B Allen <ioplex@xxxxxxxxx>]

On Tue, May 12, 2009 at 5:23 PM, Andy Fierman
<andyfierman@xxxxxxxxxxxxxxx> wrote:
> As Anthony has already asked, where is a copy of the schematic? I
> followed your link but haven't found one from there yet.

Not sure why that didn't work but here's a screenshot of the schematic
in gschem:

  http://207.192.69.113/~miallen/Amp2N5088.png

Is it customary to post an image or the actual .sch file?

> For guitar pickup modelling, you might like to do a bit of Googling on
> "spice model guitar pickup" or similar.
>
> The first one I found was this
>
> http://terrydownsmusic.com/technotes/guitarcables/guitarcables.htm
>
> Looks quite useful as a starting place.

Yes, that is a very interesting page. This is precisely the kind of
thing I'm interested in. I had no idea the capacitance of the cable
was so significant.

Anyway it looks like their AC generator is using 2mV. So the 20mV
value I used to get a good output SIN looks closer to reality which
means my model is probably ok.

I wish I had a real oscilloscope to find out what my guitar is really
putting out but xoscope doesn't seem to produce voltages (but I'm not
surprised since the sound card is probably oblivious to such things).
Maybe I'll have to get one of those PC oscilloscopes.

Thanks,
Mike


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