Anybody bold enough to try a voltage conversion on your own?


I am planning to move to Europe, and I have to convert the voltage on an audio research power amplifier, an audio research preamplifier, PS audio DAC, and a Whest Phono Stage.  While the actual price to have the factories do this is not very high, round-trip shipping and for large heavy boxes with insurance adds up very quickly! Particularly the phono stage which needs to go to England!  Not wanting to spend nearly $1000 on round trip shipping, I’d like to attempt this conversion myself, unless I am persuaded not to.

 I’ve read some of the similar posts on this forum as well as poked around on the web and I found that in many cases the conversion is simply a matter of changing the connection or sequence of a couple of wires inside the unit,  and most often does not require any serious swapping out of components.

The equipment that I would like to switch the voltage on is:

Audio Research VT100 mk II
Audio Research LS25 mk I
PS Audio Perfect Wave DAC mk II
Whest PS .30r

and lastly, the power conditioner:
Shunyata Research Talos

 Regarding this last item, the power conditioner, I spoke to Shunyata, and they told me that they can do this for me. The cost was higher than the other brands.  They would leave the standard US outlets on the back. They also told me that my collection of American Shunyata power cables will work on any voltage, so that as long as the Talos is converted to run on European voltage, the cables that I have will connect to my components, or any components that I upgrade to in the future.

So, if anyone out there has done this, or knows how to do this, I would really appreciate the guidance!  Also, if you have the skills and you are in South Florida, perhaps I will ask to hire you!

cheers,
Mark


marktomaras

Showing 6 responses by georgehifi

Slightly hotter not worth mentioning, and it's a problem with TT synchronous motors, and some microprocessors that Krell used in their 300 integrated amp. 

Cheers George 
Will the units work as the should on 50 hz?
Yes, no problems with these audio pieces.

Cheers George
Schematics for ARC preamp and power amp:

http://www.arcdb.ws/VT100/VT100.html

http://www.arcdb.ws/LS25/LS25.html
Looking at these all have multiple primaries, they both look doable from 110v to 230v.
OP, if you need to ask how to do it, DON’T!, get someone who knows.
Shouldn't take longer than 1/2hr to 1hr each, depending on access to the primaries.

Cheers George
so, where do I begin?  Pop off the top and take some photos, and show the community for advice?

Yes you could do that, take pics of the primary side of the transformer.
If there is only two wires your sunk, but if there are 4 wires that's good.

Cheers George
I don't mind using step down trany's, so long as they're quite and way over rated for the job. As they also do isolation as well, which will reduce mains noise. I use a 230v to 230v isolation trany on all my source gear in Australia for just that purpose.
As for amps though as they're not regulated, nothing beats straight into the wall mains outlet, as they sound best with the lowest line resistance, and any kind of after market conditioning to me introduces higher line resistance compared to nothing.

Cheers George   
marktomaras
an audio research preamplifier, PS audio DAC, and a Whest Phono Stage. While the actual price to have the factories do this is not very high,

Because you’ve said "not very" to the cost, by all 3 units. It sounds like they don’t need new transformers installed.
All have must have multiple primary taps on the transformers (4 wires), which can be reconfigured either series or parallel by internal switching or plugs, or physically re-configuring the primary taps.to suit the new voltage.
You can read up on doing this using Google if your up to it.
Here is a pic, the top one of the same transformer wired for 115v or 240v
http://electro-dan.co.uk/electronics/wiring.gif

Cheers George