HEIL Foot Switch Booklet–
The Heil FS-2 is a unique product specially designed for controlling two devices simultaneously. A typical application would be to key a transceiver with the BLACK lead and an RF power amplifier with the RED lead. Because of the design architecture, the micro-switch controlling the RED lead keys up first as the foot switch is depressed, thus the RED lead turns on before the BLACK lead thus insuring that the amplifier is keyed first before drive is applied from the transceiver that keys up last in the sequence.
Foot switches in stock too