Changing internal transformer of RCF power amp from 110 to 240v

[dokkodo]

If I had a heavy duty (HC3200) RCF amp that is rated to 110v, would there be an economically viable way to change it for 240v input? Assuming there isnt a switch on the unit ive missed! I read somewhere its a transformer based amp, whether thats the same transformer, in any case it sounds like it might not be so simple...

 

[chrisng]

According to the schematic, you can rewire the power transformer primary windings from paralleled to series.

 

[rayma]

Make sure to observe the proper polarities for the primaries.