X10 driver transformer - off the shelf

Hi,

Anyone any suggestions for X10 drive transformer, off the shelf? I
prefer not to go custom as the quantity is low. Ideally I'd like a
tuned transformer so I can do the whole lot in one go. I'd want step
down to reduce the primary loading. Output needs to drive 120kHz,
5Vpk-pk into 5ohm (say 7ohm with blocking cap, so 7Vpk-pk). Peak load
is thus 625mW-ish, but average load is only 120mW-ish as it is not
continuous.

This doesn't sound to me like a big transformer :-) so I would have
thought there should be an off the shelf part somewhere. Primary
drive is flexible but I'd probably want to be at 20V, or more to get
the primary load current down.

TIA

--

Malcolm

Malcolm Reeves BSc CEng MIEE MIRSE, Full Circuit Ltd, Chippenham, UK
((E-Mail Removed), (E-Mail Removed) or (E-Mail Removed)).
Design Service for Analogue/Digital H/W & S/W Railway Signalling and Power
electronics. More details plus freeware, Win95/98 DUN and Pspice tips, see:

http://www.fullcircuit.com or http://www.fullcircuit.co.uk

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