I install new Emerson pots on my '72 Telecaster Custom and have encountered a problem: the bridge tone pot. When turned all the way up it sounds like it is all the way down, i.e. the signal is passing through the capacitor. When turned all the way down it sounds correct, i.e. the signal is passing through the capacitor also. However, about half way turned down it sounds clear, the way it is supposed to sound all the way up. In other words, I have to dial 5 to get the clear 10 sound. What is causing this? Thanks.