There is a manual (partial) with Circuit diagram on BAMA http://bama.sbc.edu/yaesu.htm or ftp://bama.sbc.edu/downloads/yaesu/ftdx401/ Be aware there are MANY variations, a usefull corcuit is the ftdx-560 Rodney VK2KTZ __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com