Ken:
Just posted to my web site an updated PDF for the Samlex SEC 1223,
showing the 120VAC to 220VAC jumper location:
http://www.n0ss.net/samlex_1223.pdf
And the additional RFI reduction mods (if required) are:
http://n0ss.net/samlex_1223_rfi_mods_from_zl2df.pdf
73,
Tom N0SS