R-core transformers in Europe

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h_a

h_a

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Joined 2006
I know the ones from Selectronic and I like them; their magnetic stray field was surprisingly similar to a toroid (in terms of strength).

Has any Member assessed Selectronic's quality assurance for the product and it's manufacturing process?
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Why do you think they manufacture themselves? Selectronic is an electronics distributor.
 
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bequerel

Member
Joined 2003
I am quite confident that Selectronic source their R-core transformers from China, and that they are of the generic type just as the guys at VTC.com are selling. Custom configurations can be ordered from them, too.

I have been in contact with KITAMURA in Japan. They do not export to the Western world.
There is at least one manufacturer in the US which can do custom singles. I do not have their name here, but I got a price quotation for a transformer (R-core) for a tube line stage some time back. Think they were approx. USD100 each.
 
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AndrewT

R.I.P.
Joined 2004
RollE2k said:
I got my transformers today, so i can confirm that Shilchar is the producer, so they are made in india - not china.
Cannot say about the quality though - since it will be a while before i can use these.
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the first thing I advise checking is that the primary wire colours are correct.
Use a light bulb tester to power up.

Second recommended check is the primary voltage vs primary current and plot to see the onset of saturation. You will need a Variac that delivers upto the maximum of 253Vac/254Vac for the harmonised European voltage.
 
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Marra

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Joined 2009
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Sorry Andrew perhaps the wrong wording.
Here is a reply from Salas when I raised the point about higher secondary voltages from Selectronic Rcores in the FSP thread.

*In general those Selectronic overshoot their secondary spec by 15%. i.e. get the 15+15V model for FSP. It will give 17+17V in the European continent, even more in England
 
R

RollE2k

Member
Joined 2007
Marra said:
Generally very quiet in use but I would check the secondary voltages as they tend to run a bit higher than spec.
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I won't put any time into checking the core for saturation or so - but i will certainly check the secondary voltage..

And i will use this for the paradise phono stage, where my 24v have been a bit low - so if the voltage is a little bit higher, it is only better for me. Sounds good that they are quiet! :)
 
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