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-   -   Nelp help on AR turntable - 220V version with 110V Hurst motor (http://www.diyaudio.com/forums/analogue-source/84097-nelp-help-ar-turntable-220v-version-110v-hurst-motor.html)

cmt42001 2nd August 2006 05:03 AM

Nelp help on AR turntable - 220V version with 110V Hurst motor
 
Hi all,
Recently I brought a 1986 AR 'The turntabe' from the US Ebay along with an Alphason Xenon arm. This turntable has a back label stated 220-240VAC 50Hz and the turntable was manufactured in the UK, so I thought it can run on the power supply here in Australia. However, when I opened up the bottom cover, I saw an AC motor - model Hurst 3001 with 110VAC and 60Hz on the cover.
Now I am confused......and I would greatly appreciated if anyone can tell me what is going on???
:confused:

EC8010 2nd August 2006 08:39 AM

Synchronous turntable motors have a pair of coils. Connected in parallel, they need 110V, in series, 220V. It will be fine.

jeff spall 2nd August 2006 10:27 AM

Hi, even if the voltage can be corrected, won't the fact that it's running on 50 instead of 60 Hz be critical?
Usually, manufacturers make two pullys for AC motors,so perhaps you can get the correct one.

regards, Jeff

EC8010 2nd August 2006 10:59 AM

But the turntable says it's made for 50Hz. It will work.

jeff spall 2nd August 2006 01:42 PM

Yeeees, but if it's been running in the US with a 110v/60hz motor, it's probably got a 60 Hz pully, or it will have been running real fast over there!
regards, Jeff

EC8010 2nd August 2006 05:14 PM

Good point. A new pulley might be required.

bluetomgold 2nd August 2006 05:31 PM

I've owned a few of these (UK versions only) and if I remember rightly they all had a 110v/60hz (usually hurst) motor. Like their speakers (cabinets made in UK, US drivers), AR turntables were assembled in the UK using US parts. The woodwork was done here.

In other words, I think it will be fine. Only one way to find out though - plug it in and see!

cmt42001 3rd August 2006 02:03 AM

Thanks guys for the help, really appreciated from a frustrated AR TT owner.
I found a schematic showing the wirings of the power supply and it appears that the schematic is for conversion from 220V to 110V. Sorry that image was too large so I post the thread here:

http://www.vinylengine.com/phpBB2/viewtopic.php?t=6516

When I compared mine with the diagram it is exactly the same...When you look at the 4 wires coming out of the AC motor, the two blue wires are soldered together to netural 'N' power line while the red and black wires are in connected to L line via a 0.25uf cap. I am not sure what the cap is for and if this is in series or in parallel.
EC8010, thanks for the tips on the motor.....
I am a bit concerned if plugging into 220V socket can kill the motor if it is wired at 110V.
:cool:

EC8010 3rd August 2006 08:51 AM

Sounds as though the motor is wired for 110V, which also implies that it will have a 60Hz pulley. And yes, plugging it in to 240V when wired for 110V would probably destroy it.


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