This neat little gadget has a plug in microphone for tuning an acoustic.
Does anyone know what sort of microphone it is?
It doesn't respond to whistling at it (the built in mic does) but it does pick up the sound when placed on the speaker grille of an old Casio keyboard.
I'm starting to wonder if its not really a microphone at all, but just a pick up coil, there's no surprise that it would pick up some signal from the speakers speech coil - but that would mean that an acoustic would have to have steel strings for it to work.
ian field wrote: > This neat little gadget has a plug in microphone for tuning an > acoustic. > Does anyone know what sort of microphone it is?
From the photos, it looks like a typical piezo. You can buy those transducers as separate, aftermarket gizmos to plug into other tuners.
If you had a preamp with high enough input impedance, you could probably use the thing as an acoustic guitar pickup. But it probably won't work very well plugged in to most normal guitar amps.
> ian field wrote: >> This neat little gadget has a plug in microphone for tuning an >> acoustic. >> Does anyone know what sort of microphone it is?
> From the photos, it looks like a typical piezo. > You can buy those transducers as separate, aftermarket > gizmos to plug into other tuners.
> If you had a preamp with high enough input impedance, > you could probably use the thing as an acoustic > guitar pickup. But it probably won't work very well > plugged in to most normal guitar amps.
Thanks - what sort of money are the aftermarket accessories?
ian field wrote: > Thanks - what sort of money are the aftermarket accessories?
> If they're cheap enough, I could pick one apart.
If you're good enough of a "picker-aparter" it's essentially a piezo buzzer (rat shack couple bucks) used in reverse, as an input device instead of an output device.
Shield the heck out of it. Whichever lead you use for the braid side of the unbalanced signal, continue that to shield around the transducer.
>> Thanks - what sort of money are the aftermarket accessories?
>> If they're cheap enough, I could pick one apart.
> If you're good enough of a "picker-aparter" > it's essentially a piezo buzzer (rat shack couple bucks) > used in reverse, as an input device instead of an > output device.
> Shield the heck out of it. Whichever lead you use > for the braid side of the unbalanced signal, continue > that to shield around the transducer.
If its a piezo a signal generator should be able to get a tone out of it.
The DMM says it open circuit and a capacitance meter says about 6.3nF, so it probably is.
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