Eisermann, Phil [Ridg/CO] wrote:

> Does anyone know the long-term affects of this on the buzzer life?

  No, but ... if the device is self-oscillating ("negative-resistance
oscillator") and has no moving parts beyond the reed, why would it fail?

> the board house substituted a "direct replacement" buzzer with
> (nearly) the same characteristics.  Now, i'm starting to see
> more failures than make me comfortable.

  Can you define "failures"?  Failure to work under your conditions?
Failure to work at original specification?  Won't work as built?  Fails
later?
--
  Cheers,
        Paul B.