The signal from a pre-amplifier or tuner is supplied to the input terminals of the power amplifier by means of a voltage-dividing network, the element is parallel to these input terminals being a photo-sensitive resistor of new design. Facing this photo-resistor in a lightproof enclosure is a neon lamp connected to the output voltage of the amplifier. Because a neon lamp ignites at a fixed voltage, the value of the photo-resistor resistance will be decreased as soon as this voltage is reached. Consequently the input signal to the amplifier will be decreased as well, making overload substantially impossible.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.