Orientation and phasing of transformers?

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I am building an amp with symetrical powersupply. The transformers are two identical EI-core, both with a single 25V secondary winding and a single 230V primary winding.

Is there and optimum way for orienting the two transformers for a minimum total field radiation?

Wil there be some benefit in connection the primaries and/or secondaries in phase or oppesite phase for some kind of cancellation of melectrical fields?
 
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