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AR XA 220V to 110V
AR XA 220V to 110V
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Old 11th February 2009, 11:34 AM   #1
dan duette is offline dan duette  South Africa
diyAudio Member
Join Date: Jun 2007
Default AR XA 220V to 110V

Have rebuilt an AR XA but seem to be having a problem with the power supply/voltage selector switch. Can anyone supply me with a with a circuit diagram for stepping our local 220v down to 110v at 50hz? Then maybe I can get rid of the overly complex and possibly faulty selector switch and simplify the whole thing somewhat....

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Old 13th February 2009, 02:04 AM   #2
tedr is offline tedr  United States
diyAudio Member
Join Date: Jul 2006
A 2:1 step down transformer is all you need, they are probably available from electronic parts suppliers in SA. Alternatively have you tried looking for a mains adapter? Comes with input and output connectors already fitted (for safety) and probably not much more than a transformer. You need very little power for a TT motor, probably less than 50Watts, maybe even as little as 10Watts.

You could also seek guidance at this website

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Old 13th February 2009, 02:08 PM   #3
sreten is offline sreten  United Kingdom
Join Date: Nov 2003
Location: Brighton UK

All you need to do is ~ double the value of the supply resistors
and ~ half the value of the phase shifting capacitor (or leave it).
Just make sure the capacitor has the correct voltage rating.

Many 240VAC turntables use 110V synchronous motors, e.g. LP12.

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