>         At http://www.national.com/an/AN/AN-146.pdf this is an old
> appnote for sending FM through the AC line but it specifies line
> signal xformers. I used these with appropriate caps to tune to the
> x10 signal frequency.

Thought that looked familiar. It's in NatSemi's Linear Applications
Databook. I'd put a couple of Post-Its on that page with contact
details of the coil winder. I remember comparing it to the baby
monitor

> The part numbers have changed since the appnote. The
> parts I ordered many years ago were TOKO RAN 10A6729
> for the Tx xformer, and RAN 10A6845 for the Rx xformer,
> they may gave changed since then?
>
> These may be the same ones Jinx had mentioned.

Maybe. It's also some years since I was involved in that project
and AFAIK Toko coils were not available off the shelf at that
time, in NZ which is why I had them dissected and copied. The
schematic has no Tx numbers, sorry, but I guess they'd be
some standard type

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