On Thu, 15 Jul 2004 10:30:02 -0700, Roy Lewallen
wrote:

I, and I'm sure quite a few others, would have recommended a simple
transistor stage as a solution except for your request in the original
posting about not wanting to suffer too much power loss. If your only
concern is the amount of audio power you get out, and you're not
concerned with overall power consumption, then an active stage is
certainly an alternative. The type of circuit you choose would depend on
how much efficiency you need and how much audio output power you
require. An emitter follower is the simplest but least efficient; a
comlementary-symmetry stage would be more efficient but more complex.

THanks again. I note your comments but will try a couple of other
things first, whilst the initial assembly is still in one piece. One
such idea is the doubling or trippling of the supply voltage alone.
Does anyone know by how much it's safe to increase the 1.5V supply to
the mic insert and whether that might also cause distortion?
--

"What is now proved was once only imagin'd." - William Blake, 1793.