Noise in my Line Splitter - HELP

Hey guys,

http://www.jensen-transformers.com/as/as014.pdf

A while back I posted a msg about making a guitar line splitter. I built it, using a breadboard. There still seems to be a varying amount of radio interfence and other buzzing/humming on each output. Im pretty new at this. Do all the connections between transformers/resistors/jacks have to be like heat shrunken, and covered? I dont want to commit the design to a real board, and and still have these problems.

Any advice in keeping noise out of your projects would be awesome.

Thanks,
-Dan