I was reading around about how the standby switch is really a bad idea because of the shock of power to the tubes and filter caps so I was thinking of putting a mute switch in the ground switch slot. Someone on some forum (gearpage maybe?) suggested connecting the switch just before the phase inverter which does seem like a handy spot and when you switch it on it dumps the signal to ground. What I'm wondering is do I need shielded cable running from the V2B grid to the switch or can I run normal wire. I understand there is no current running in that wire when its not muted BUT I'm concerned it might act as an antenna or something and pick up unwanted noise and feed it into the phase inverter. Am I overthinking this?