The filament winding has the thick lead, not the mains winding. HV winding
will have a higher resistance. 6 volt and 5 volt windings are very very hard
to tell apart with your average ohm meter. The mains winding could be dual
voltage 120/240 or........105/110/115/120 voltages. The use of an amp meter
along with real low ac voltage should be used to find which winding is
which.
Regards,
Gary...WZ1M
...
"Leon" wrote in message
oups.com...
You will have to experiment, carefully! The mains winding will be the
one with the thick leads, of course, so should be easy to identify. You
should be able to work out the others by checking the resistances and
then measuring the voltages with the supply connected.

73, Leon