FORUM ALERT!!
The original R-core of TU-879S does not have the coloured tabs for multi voltages; they have either 100V , 120V, or 230V custom made for the specific area by Phenix, Japanese R-core transformer maker. http://www.pnxcorp.co.jp/index1.htm
When purchasing your TU-879S kit, please ensure that you are getting the original R-Core transformer made by Phenix, Japan to maintain optimum quality output (see pic without coloured tabs for voltage). A lot of clone R-core transformers use inferior (poor quality) iron and of course the sound quality will be downgraded. The clones are not up to the standard of quality of the original R-Core invented and licensed by Kitamura Kiden Japan. Be wise and go with the original R-Core and not the reproduction.
Extracted from 6moons
http://www.6moons.com/audioreviews/elekit/6L6_6.html
Consumer Alert (July 11, 2011):
