Buzz with all power off


Peculiar thing going on....Audible buzz occuring(in High efficiency speakers) when all power in system is down. The buzz however is intermitant and comes and goes randomly...very annoying. All tube system(Pre,Power Amp,Phono Amp,Thorens td-124 TT) Any helpful hints?
fromunda
If within the time the buzz will increase, consider your speakers turned onto beehive bzzzzzzzzz LOL!
Digital Cell phones (Blackberry in particular) can induce current on wires. Happens in conference calls all the time. Are you in an apartment next to a neighbor with a blackberry?