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Melos SHA-GOLD 220V to 110V conversion

post #1 of 6
3/2/10 at 11:58pm
Thread Starter 
Anyone attempted to do this? I know I can use a converter but would like to contain it if I could. Do I have to replace the transformer inside the unit? Or are there some jumpers to remove? Does anyone have schematics? Would anyone be willing to snap a photo of inside their unit and send it to me for comparison?
Any help would be appreciated!
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post #2 of 6
3/3/10 at 12:24am
Take a photo of your transformer as there are multiple units to have been used. I have a schematic in my modification log (link in signature).
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post #3 of 6
3/3/10 at 12:48am
Thread Starter 
Hey thanks for the reply. I have actually heard that you know your way around these preamps quite well. I don't quite have it in my hands yet. However there is a pretty good photo of it in this for sale thread:
http://www.head-fi.org/forums/f42/fs...d-sold-472653/
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post #4 of 6
3/3/10 at 3:28am
Well, that one looks like pretty simple - by that photo, the primaries are in series so all you should need to do is get rid of that little white cable jumper between the AC input white/black pair and wire it so that they're in parallel (attach "left" side of previously jumpered terminal to black, "right" side to white) and you should be good to go with 110V.
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post #5 of 6
3/3/10 at 4:10am
Thread Starter 
Quote:
Originally Posted by FallenAngel View Post
Well, that one looks like pretty simple - by that photo, the primaries are in series so all you should need to do is get rid of that little white cable jumper between the AC input white/black pair and wire it so that they're in parallel (attach "left" side of previously jumpered terminal to black, "right" side to white) and you should be good to go with 110V.
Thanks a bunch for the info. I still hadn't had a chance to glance at the schematics.
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post #6 of 6
3/3/10 at 4:38am
Not much to look at by schematic, it's the transformer I was worried about. Yours looks to have dual primaries at 2x110V, so they are connected in series for 1x220V. Good luck with the mod.
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