hey, so i had my array of boss pedals which were all running of 9 volt batteries and when i ran it through the fx loop of my peavey i got this horriffic hum sound, i understand that the boss pedals make a bit of buzz but this is just annoying. im running a boss ns-2 noise gate in the loop and well its not really doing much to fix the noise. so i decided to pick up a power brick - i hoped this would somehow fix my problem. i plugged it in today and euck, ive still got hum. what i noticed: the hum is at a constant volume and only present when the fx loop button on the foot switch is pressed. its certainly not my guitars because they're all earth grounded etc and i dont get noise through other amps. its not the fx return because i ran an mp3 player into it and used the peavey as a power amp to test and i didnt get a single annoying bit of noise. from what i've noticed its almost as if when i use the fx loop the preamp signal doubles (and the peavey is already a prety noisy amp) so it tends to double the noise. what the fuck can i do to shut the fucking thing up? its really pissing me off. so noise gates dont work? would a power conditioner to the job? is there a small device i can just clip onto the end of my plug to like...earth it better? i dont want to go out spending lots of money on different things to try and fix the problem. if anyone has the same problem as me and learned how to fix it then please let me know. on that note im in ireland so our voltage is between 220 and 240 and on the amp there is a switch to swap between 220 and 240. i tried both and to no success. im running everything at the correct ohms and voltage and my cab is a brand new marshall 1960 lead A using a marshall speaker cable. HELP!!! i really want to use my fx loop as this christmas im investing in shit loads of pedals and a voodoo labs ground control etc and it will all be a big waste if i cant even get a clean sound from the amp. is it possible that the fx loop is damaged because the return has no hum but the send seems to create a humming sound. it almost sounds like a guitar cable plugged into an amp but not into a guitar and when you touch the head you get a buzz - its pretty close to that. but all my cables are fine because i tested them going into the guitar input on the amp and they are pretty much noiseless 10 browny points for the chap or chapess that comes up with the fucking solution!