Debbie Hynes wrote:
> Crikey, this is all getting somewhat heavy seeing as the cct is a just
> a puny ol'audio amp. ;)
>
> Attached (4k gif) is a schematic of a hydrophone amp I made yonks back.
> It used a mylar spkr but didn't work too well under water coz it
> couldn't hack any pressure. But it should function ok as a microphone?

This seems to be the same basic concept with a better DC bias arrangement
and transformer coupled output.  That makes sense, but I don't see what
advantage you are getting from R5 unless this circuit had to work with a
particular transformer you happen to have already.


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