That sounds lots better now. The humming sound from th Orange C3 comes from the guitar, if you touch grounded steel on the guitar it stops wright?

You can ask a guitar tech to check the wiring in the guitar, normally there has to be a ground wire connected to the bridge and the pots and the jack input. Another thing he can do is open the guitar and aply a metal shielding paint ( can be bought in most music stores ) to the inside of the guitar and connect that to the grounding as well and that should make the guitar hum and his free( you can also cover the inside with thick alu foil glued )( with more expensive guitars this is already done factory wise but unfortunatly not Mexican Fenders ).

Herman