Angela has brought this to us :
It's a brand new house so hopefully the developer knew how to install. I've
looked at it, it's a Friedland chime, no model number on it. I took the
cover off but no help there except it says max 15w where there ios space for
the backup battery (none fitted). Having looked online it looks like a
model called "big ben" . In fact it says that all lit bell pushes must be
used with a transformer and mine does have a lit up bell push. Looking
hopeful!

In that case fine, there should be no problems. The lit bell push must
be used with a transformer because the lamp would discharge the battery
in no time at all. I think the 15w will be 15v (typo?)

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