Technics SP10

haydn · 24th May 2004, 04:43 PM

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.

sreten · 24th May 2004, 05:48 PM

you sure the power supply can't be set to 240V ?

sreten.

haydn · 24th May 2004, 06:25 PM

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.

sreten · 24th May 2004, 10:16 PM

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.

sreten.

haydn · 24th May 2004, 10:38 PM

Excellent, problem solved. Thank you for all your help

haydn · 24th May 2004, 10:52 PM

Will it change 50 hz to 60hz, that is my main concern as this is important with turntables.

EC8010 · 25th May 2004, 12:49 AM

Not with an SP10. It's a direct drive that references its speed to an internal crystal, not the mains.

haydn · 25th May 2004, 08:41 AM

"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

sreten · 25th May 2004, 09:47 AM

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.

sreten.

haydn · 25th May 2004, 11:16 AM

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.

24th May 2004, 04:43 PM	#1
haydn diyAudio Member Join Date: May 2004 Location: Cornwall	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. __________________ Haydn

24th May 2004, 06:25 PM	#3
haydn diyAudio Member Join Date: May 2004 Location: Cornwall	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. __________________ Haydn

24th May 2004, 10:38 PM	#5
haydn diyAudio Member Join Date: May 2004 Location: Cornwall	Excellent, problem solved. Thank you for all your help __________________ Haydn

24th May 2004, 10:52 PM	#6
haydn diyAudio Member Join Date: May 2004 Location: Cornwall	Will it change 50 hz to 60hz, that is my main concern as this is important with turntables. __________________ Haydn

25th May 2004, 12:49 AM	#7
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	Not with an SP10. It's a direct drive that references its speed to an internal crystal, not the mains. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...


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24th May 2004, 05:48 PM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	you sure the power supply can't be set to 240V ? sreten.

24th May 2004, 10:16 PM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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. sreten.

25th May 2004, 08:41 AM	#8
haydn diyAudio Member Join Date: May 2004 Location: Cornwall	"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 __________________ Haydn

25th May 2004, 09:47 AM	#9
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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. sreten.

25th May 2004, 11:16 AM	#10
haydn diyAudio Member Join Date: May 2004 Location: Cornwall	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. __________________ Haydn

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