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Old 11th April 2005, 03:38 PM   #1
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Default Change input voltage to 220v

Hello everybody!
I'm new in this forum and I'm writing from Italy.
I want to buy a Mark Levinson 23.5 amplifier but I have to change input voltage from 110v to 220v.
I know this is easy... only arrange few wires. But where I can find some information about doing this? Is there someone who can help me?
Thank you in advance and sorry for my bad English.
Regards,
Emiliano
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Old 11th April 2005, 08:20 PM   #2
Netlist is offline Netlist  Belgium
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Just a small warning before you buy, assuming it's a second hand unit. (Or even new)
Make sure it can be converted to 220V.
Ask the seller to (let it) convert for you, sometimes these things can be tricky.

To proceed to the normal technical issues:
Usually, the primaries of the mains transformer simply have to be wired in series for 220V and in parallel for 110V.
However, if you don't have the necessary knowledge or wiring diagram of the amp, ask an expert.

/Hugo
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Old 12th April 2005, 08:42 AM   #3
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Thank you for your answer.
Yes, it's a used unit.
I asked the seller to convert it for me but he isn't able to do this.
Only he said it's easy to do.
I know all Mark Levinson units can be converted with few simple operations... but I don't know how.
I'm looking for a techical manual a simple wiring diagram which explains how to do this.

Regards,
Emiliano
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Old 12th April 2005, 08:47 AM   #4
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I would double check with ML. An email should do the trick
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Old 22nd May 2005, 07:16 PM   #5
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Hi Emiliano,
have you found out a way to change your input voltage!?

Thanks: aventura#libero.it

Cią
Ale
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Old 23rd May 2005, 07:11 AM   #6
Optical is offline Optical  New Zealand
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Quote:
Originally posted by Netlist

To proceed to the normal technical issues:
Usually, the primaries of the mains transformer simply have to be wired in series for 220V and in parallel for 110V.
However, if you don't have the necessary knowledge or wiring diagram of the amp, ask an expert.

/Hugo

could I still parallel the primaries of two 110V devices even if the devices were of different wattage/completely different appliances?

my case in point - I have two 110V mixing desks and am using a step down for each, they are totally different in every other way..
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Old 23rd May 2005, 07:43 AM   #7
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Quote:
Originally posted by Optical
could I still parallel the primaries of two 110V devices even if the devices were of different wattage/completely different appliances?
It will work only if the two devices draw exactly the same current at exactly the same time. So two lamps wired in series will work, two amplifiers will not. Best to stick to the step down transformers.
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Old 23rd May 2005, 10:07 AM   #8
Optical is offline Optical  New Zealand
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Quote:
Originally posted by pinkmouse


It will work only if the two devices draw exactly the same current at exactly the same time. So two lamps wired in series will work, two amplifiers will not. Best to stick to the step down transformers.

ah i thought as much, thanks
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Old 23rd May 2005, 07:36 PM   #9
AndrewT is offline AndrewT  Scotland
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Hi Emiliano,
any success in finding the voltage conversion info?
Could Levinson be using that Krell trick of a detector for voltage & frequency to deter grey/ parallel imports?
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Old 24th May 2005, 04:22 AM   #10
Chalitr is offline Chalitr  Thailand
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I saw thw Levinson number 29 not 23.5 but assume the same age. The 2 transformer that mount on the front panel indicated exact 220 volts use only. I think that it's better that you open the top cover and look inside again.
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