Differential Reverb (better subject line!)

[KA4HJH]

>A couple of friendly suggestions for this circuit:
>
>Invert the receive transducers instead of the send transducers; hum
>cancelling for free!
>
>Accutronics recommends using lots of drive current; more than an opamp
>could provide.  Their application note has half-a-dozen drive
>circuits.

I don't know what brand my tanks are, but with just op-amps they can be
overdriven, which is rather jarring.

Found some interesting info/$ on Accutronics tanks on the web:

http://www.teleport.com/~vibroman/parts/tech18.html

and

http://www.stf-electronics.com/Page0014.Html

Check it out.

Terry Bowman, KA4HJH
"The Mac Doctor"