Marcus Springfeld, DL2GMS, designed this excellent 3 band single feed Moxon antenna.  There are many multiband Moxons on the site but not too many single feed designes.  Based upon the observed results, this design is one of the best.

DL2GMS has provided a PDF FILE with the design.

Here are some highlights:

Build it and the DX will come.  Many thanks to Markus for his excellent work.  

Marcus can be reached at info@msrecords.de if you have any questions.