Replacement Gallien Krueger transformer (240v to replace 110v)

[dangerboy]

I have an old Gallien Krueger 250ML (guitar combo) but it's annoyingly 110V so it needs a big transformer to plug into in the UK. 

So I thought, why not have a look inside and see what I can do? I don't really care about it but fixing it seems fun.

 

It has a big chassis transformer mounted inside. This is labelled "00617 MAGCOMP MC-1724 8811". It has five leads coming off it labelled 1,2,3,4,5

Here is the schematichttp://bee.mif.pg.gda.pl/ciasteczkowypotwor/%23pro_audio/Gallien-krueger/Gallien-krueger_250ML,_250RL,_212SCL_Service_Manual.pdf

 

Are any of you wise in these things and can point me at an equivalent designed for 240V mains?  

 

I took it to an amp tech but he kept it for a month then gave it back to me, saying the change was "uneconomic". But it seems like a fun project. 

[ClusterOne]

Hi,

 

Not going to be of much help but i can see the output from rectifier is +45V and -45V so perhaps secondary winding output of transformer has to be in such region. As that is what feeds rectifier.

 

I don’t remember much from college (studied electronics extensively) but i can imagine two wires on input (220V) so them three should be related to output..

See diyaudio website, people there design their own amps and perhaps someone there could help on how to go about sourcing appropriate transformer for your amp.