on 26/11/2010, Frank Erskine supposed :
Most of that consumption (unless you have an awful lot of callers) is
probably being eaten up by the bulb in the pushbutton.

Budget around half a watt or so for that. You could reduce it by
replacing it with a suitable white LED.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk