My randall RH150G3 has a bad humming problem and ive read that alot of the amps in the series are having similar problems. ive thought about selling it but i want to keep it as its a nice camo one. i was just wandering if anyone knew how to contact a uk service centre if one exsists. does anyone know how i can ghet it checked out under warranty. ive only had about 6 months. thanks