How easy is it to convert from 110V AC to 240V AC?

spikeyfaz · 1st December 2007, 04:35 PM

I've been offered an old kenwood DD turntable for next to nothing. No idea what model as I have yet to see it but I understand that it is designed to run of 110V AC.

Is it possible to adapt it to run off 240V AC by just replacing the mains transformer or is it more complicated than that?

sawreyrw · 1st December 2007, 04:40 PM

I think the easiest thing to do is use a 240 to 110 volt step down transformer.

kevinkr · 1st December 2007, 04:40 PM

You may be able to find a suitable replacement mains transformer or just use an auto-transformer to step down the 240V to 120V.. If the table has a stroboscope for 60Hz only (unlikely) you may have a little trouble setting speeds..

spikeyfaz · 1st December 2007, 05:04 PM

Yes, a step-down transformer seems the easiest way forward, (I hadn't even thought of that that option!).

From what I recall it does have a strobe ring on the outside of the platter. Is there any way I can get this to work in the UK? Seems as a shame not to be able to use the strobe .

stoN_Cold · 1st December 2007, 05:56 PM

What is the model of turntable ?

regards zeoN_Rider

spikeyfaz · 1st December 2007, 07:22 PM

I've just come off the 'phone from the current owner of said turntable and he informs me it's a 3070.

He just want's shot of it as he cannot use it due to the 110V AC configuration. I figure it would be worth having a play with so I think I'll buy it and see what happens.

dangus · 2nd December 2007, 01:30 AM

Some (most?) turntables that use a line-powered neon strobe have two sets of markings on the platter for 50 and 60 Hz operation.

spikeyfaz · 2nd December 2007, 12:54 PM

Quote:

Originally posted by dangus
Some (most?) turntables that use a line-powered neon strobe have two sets of markings on the platter for 50 and 60 Hz operation.

This tt has unfortunately only one set of markings. Is there a way I can get the strobe to work properly by using another light source??

AndrewT · 2nd December 2007, 01:01 PM

Hi,
count how many times it turns in three minutes. 100T+-0.25T should be good enough.
Forget the strobe. It changes with the mains frequency.

spikeyfaz · 2nd December 2007, 01:37 PM

Quote:

Originally posted by AndrewT
Hi,
count how many times it turns in three minutes. 100T+-0.25T should be good enough.
Forget the strobe. It changes with the mains frequency.

Good idea. I think I was just after the pose value with a nice big strobe on the tt

but so long as it sounds good then that's all that maters.

1st December 2007, 04:35 PM	#1
spikeyfaz diyAudio Member Join Date: Nov 2005 Location: Sussex	How easy is it to convert from 110V AC to 240V AC? I've been offered an old kenwood DD turntable for next to nothing. No idea what model as I have yet to see it but I understand that it is designed to run of 110V AC. Is it possible to adapt it to run off 240V AC by just replacing the mains transformer or is it more complicated than that?

1st December 2007, 04:40 PM	#3
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts	You may be able to find a suitable replacement mains transformer or just use an auto-transformer to step down the 240V to 120V.. If the table has a stroboscope for 60Hz only (unlikely) you may have a little trouble setting speeds.. __________________ "To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine

1st December 2007, 05:56 PM	#5
stoN_Cold diyAudio Member Join Date: Mar 2004 Location: Belgrade RS	Hi !spikeyfaz What is the model of turntable ? regards zeoN_Rider

2nd December 2007, 01:01 PM	#9
AndrewT R.I.P. Join Date: Jul 2004 Location: Scottish Borders	Hi, count how many times it turns in three minutes. 100T+-0.25T should be good enough. Forget the strobe. It changes with the mains frequency. __________________ regards Andrew T.

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1st December 2007, 04:40 PM	#2
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	I think the easiest thing to do is use a 240 to 110 volt step down transformer.

1st December 2007, 05:04 PM	#4
spikeyfaz diyAudio Member Join Date: Nov 2005 Location: Sussex	Yes, a step-down transformer seems the easiest way forward, (I hadn't even thought of that that option!). From what I recall it does have a strobe ring on the outside of the platter. Is there any way I can get this to work in the UK? Seems as a shame not to be able to use the strobe .

1st December 2007, 07:22 PM	#6
spikeyfaz diyAudio Member Join Date: Nov 2005 Location: Sussex	I've just come off the 'phone from the current owner of said turntable and he informs me it's a 3070. He just want's shot of it as he cannot use it due to the 110V AC configuration. I figure it would be worth having a play with so I think I'll buy it and see what happens.

2nd December 2007, 01:30 AM	#7
dangus diyAudio Member Join Date: May 2004 Location: Vancouver Island	Some (most?) turntables that use a line-powered neon strobe have two sets of markings on the platter for 50 and 60 Hz operation.

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