AR XA 220V to 110V

dan duette · 11th February 2009, 10:34 AM

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....

Thanks

tedr · 13th February 2009, 01:04 AM

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
http://www.vinylengine.com/phpBB2/vi...2bbccc8980e6a6

Ted

sreten · 13th February 2009, 01:08 PM

Hi,

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.

Search .....

/sreten.

11th February 2009, 10:34 AM	#1
dan duette diyAudio Member Join Date: Jun 2007	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.... Thanks

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13th February 2009, 01:04 AM	#2
tedr 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 http://www.vinylengine.com/phpBB2/vi...2bbccc8980e6a6 Ted

13th February 2009, 01:08 PM	#3
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, 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. Search ..... /sreten.

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