[FStephenMasek]

The pilot tuner is designed to be very convenient. What you are doing when you connect it that way is routing the signals from the radio to the Pilot tuner. When the Pilot tuner is off, then signal just goes back to the radio, and it operates normally. When the Pilot is on, the signal from the radio stops at the Pilot, and the signal from the Pilot goes into the radio and through its audio amplifier circuits and out the radio's speaker(s).

The Pilot can also be connected to the phonograph input, or can be connected between the phonograph and the phonograph input.