a little different

[23]

Im looking  for a DIY impedence device called Mike Mojo, its for harp players to plug straight into an guitar amp with "i assume" little to no worries... Im not a harp player yet but have been experimenting with the instrument for a while now, gonna buy my first mic soon, any suggestions on that? Looking at an astatic.

thanks sands

[CynicalMan]

I assume you mean this: http://web.archive.org/web/20050925132426/http://www.ironmancurtis.com/MMojo.txt

A FET buffer would probably be easier, higher fidelity, and wouldn't need a Vr circuit or two 9V batteries. Also, the article says an infinite input impedance, but it's really 300k and up, depending on the 741.

[23]

point me in the fet buffer direction please........ i know there used in inputs and outputs but Ive never really been able to completely isolate one...by the way thanks for the reply.

[23]

Never mind, but what would be best for harp, everything Im finding is for guitar, or should I just use one for peizo?

[CynicalMan]

Check out the fourth picture down here: www.muzique.com/lab/buffers.htm
I would probably increase the 1M resistors to 2M2. The second picture would also work, although with less headroom.

[23]

thanks alot, I found that page but wasnt quite sure.......again thanks


sands