Vintage Simmons Drums (UK) Users Group

i thought there was voltage to some degree ,thats why it triggers when you plug the jack in the pad,but honestly im still learning every day about electronics,one thing i did notice is that when i trace the circuit with the volt meter ,there is at least .oo1 volts present dc,i am open to advice,ithoght voltage was present and depending how much the peizo (graphite)contacted allowed more voltage through it back to ground??.wish Michael Buchner lived in north america so i can get these modules fixed