Clifton WMT-555C guitar tuner.

[ian field]

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.

Anyone know?

TIA.

[Lumpy]

Post by ian field
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.


Lumpy

In Your Ears for 40 Something Years
www.LumpyMusic.com

[ian field]

Post by Lumpy

Post by ian field
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?

If they're cheap enough, I could pick one apart.

[Lumpy]

Post by ian field
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.


Lumpy

In Your Ears for 40 Something Years
www.LumpyMusic.com

[ian field]

Post by Lumpy

Post by ian field
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.