[sdiy] Modding Matrix 6R PSU?

[cheater cheater]

Don't worry, I got shocked by 220V thrice on different occasions as a
small kid. One more won't do anything the previous ones couldn't.

D.

On Wed, Sep 23, 2009 at 4:49 PM, Tom Wiltshire <tom at electricdruid.net> wrote:
> I did something similar to a US Korg Polysix once upon time.
>
> Here's how I'd go about it:
>
> 1) Disconnect the transformer secondary wires from the rest of the power
> supply so you don't blow anything up.
> 2) Test it as it stands now so that you know how much AC the AC/DC
> conversion part of the power supply is expecting. You need a 240/120V
> adaptor for this. Beg/borrow or steal one from a building site.
> 3) Have a cup of coffee so you brain is awake enough to deal with mains
> electricity and/or stand on a rubber bathmat ;)
> 4) Disconnect everything
> 5) Have a look at the primary side of the transformer. Usually this consists
> of a pair of windings of which one is used for 120V and both are used (in
> series) for 240V. Sometimes there'll be four wires, two each for the two
> windings, and sometimes there are only three, with one common to both
> windings.
> 6) Solder it up with both primary windings in series
> 7) Reconnect and test the secondary output. With a bit of luck, the lights
> in your house are still on, and the secondary voltage is the same as it was
> in step 2.
> 8) If it is, wire it all back up and bingo!
>
> Fur gawd's sake, be careful.
>
> T.
>
> On 23 Sep 2009, at 09:23, cheater cheater wrote:
>
>> Hi guys,
>> I have recently bought a Matrix6R. It's a 120V version, supposedly.
>> However, it turns out that the transformer inside it is rated as:
>>
>> 100V/230V
>> 41V    30VA
>>
>> ..which looks promising I guess?
>>
>> The whole marking on it is:
>> BANDO EP-55
>> (307-01257)
>> BE2-GJM
>>
>> 61-12663
>> 100V/230V
>> 41V 30VA
>> and then a line of Japanese :)
>>
>> soooo.... anyone got a clue what I'd do to make this thing eat 230V?
>>
>> Thanks
>> D.
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>
>
>