I looked around a little bit, but must have missed it, wherever it
> is.
>
> Does anybody know of a source for variable speed, tape-to-tape
> duplicators (or at the least, a good magazine article somewhere for
> building your own), where the tapes to be duplicated are those little
> micro or miniature tape cassettes used in answering machines? I know
> I will need a transport mechanism of some kind, for advancing the
> tape and running it past a read/write head, so where should I look
> first, and what would be a good bargain for me?
>
> Now, in case the thing I have described is so trivial a thing to do,
> how about a row of such tape-to-tape duplicators, with slide pots so
> I can adjust the volumes for a whole row of such micro-sized tape
> cassettes being duplicated?
>
> The end result would be used for mixing the tapes together on a
> single tape.
We have something like that, only it's for a regular compact cassette. It's a high speed dupe, that can dupe at double or more speed. But you're probably better off getting a service to do it.
But nowadays, almost everyone has converted to CDs. You can get those little CDs that take up a lot less room, and cost very little to duplicate.