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Old 24th May 2004, 03:43 PM   #1
haydn is offline haydn  United Kingdom
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Default Technics SP10

Is it possible to use a 120 volt 60hz Technics SP10(early two speed model) on 240 volts 50hz if I use a step down transformer.
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Old 24th May 2004, 04:48 PM   #2
sreten is offline sreten  United Kingdom
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you sure the power supply can't be set to 240V ?

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Old 24th May 2004, 05:25 PM   #3
haydn is offline haydn  United Kingdom
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Default power supply

The original SP10 has an on board power supply not a SH-10E that the MK11 uses. I will check to see if it can be changed, but I do not think it can. Thank you for your response all the same.
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Old 24th May 2004, 09:16 PM   #4
sreten is offline sreten  United Kingdom
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Well if i can't be set to 240V then :

http://maplin.co.uk/products/module....moduleno=31899

should do the job, they've also got the price wrong,
I wonder if they'll let you order it, should be 29.99.

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Old 24th May 2004, 09:38 PM   #5
haydn is offline haydn  United Kingdom
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Excellent, problem solved. Thank you for all your help
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Old 24th May 2004, 09:52 PM   #6
haydn is offline haydn  United Kingdom
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Will it change 50 hz to 60hz, that is my main concern as this is important with turntables.
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Old 24th May 2004, 11:49 PM   #7
EC8010 is offline EC8010  United Kingdom
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Not with an SP10. It's a direct drive that references its speed to an internal crystal, not the mains.
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Old 25th May 2004, 07:41 AM   #8
haydn is offline haydn  United Kingdom
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"In 1970 National Panasonic (Technics) had introduced the SP10 direct drive turntable. It was a single unit with no seperate power supply. Its speed was regulated by reading the minute fluctuations of the platter with a tachometer and correcting the turning of the motor".
It is the MK11 which uses the crystal. The above quote was taken from a history of the SP10
Will the frequency change from 60-50hz allow the use of a stepdown transformer
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Old 25th May 2004, 08:47 AM   #9
sreten is offline sreten  United Kingdom
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Hi Haydn,

The frequency change will have no effect as direct
drives do not use AC synchronous motor principles.

The "tachometer" referred to in your quote is almost
certainly referenced to a quartz / crystal oscillator.

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Old 25th May 2004, 10:16 AM   #10
haydn is offline haydn  United Kingdom
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Default SP 10

I aquired the information about the original SP10 from www.xs4all.nl/~rabruil/sp10page.html. I hope you are correct in your assumptions. I will let you know how it works when the Maplins transformer arrives.
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