VOLTAGE IN	7-15 Volts DC @ < 15mA, polarity inversion protected
PTT, PEDAL, RTTY-PTT control	5V floating voltage, ground to activate; less than 1mA
RADIO SEND	5V floating voltage, ground to activate; less than 1mA. Input from TX to amplifier control
TO RADIO PTT IN	Open collector capable of switching  40 Volts DC (positive only) @ 800ma, goes low on TX; relay back emf protected
KEY IN	Two high impedance input, iambic or straight
KEY OUT	Two open collector outputs capable of 40 Volts (positive only) @ 400ma; mirroring KEY IN but with user selectable buffered delay from 10 to 80ms
AMPLIFIER RELAY	Open collector capable of switching  40 Volts DC (positive only) @ 800ma, goes low on TX; relay back emf protected
PRE	Open collector capable of switching  40 Volts DC (positive only) @ 400ma, goes low on RX; used for pre-amplifier selection
CW Buffer Delay	User programmable from about 10 to 80 milliseconds
PTT Delay	User programmable from about 7 to 180 milliseconds
DIMENSIONS	Printed Circuit board is 50mm X 35mm