tranformer coupler question

[eoinitb]

i am building a project to send data on the mains cables i am having trouble source a transformer the tranformer i need has a turns ratio of 1:1:2 as can be seen in the pic below i have a few transformers which have a ratio of 1+1:2+2 could i use these if not could someone suggest a part .ive never used them before im kind of lost

[bridgen]

There seems to be a mixture of conventions in your posting.<p>If I read your 1+1:2+2 correctly it has two centre-tapped windings.

If that is the case you can ignore one half of the 2+2 winding and use the other half as the left-hand winding of your diagram.