This is the SEQ-1 relay sequencer board.  It is the same size as our other boards so it will fit into the ENC-2 Enclosure. It requires a power supply of +12 volts, and a PTT input line that goes to ground to activate the relays.  The output relays are normally open until sequenced, but the 4 position slide switch can be used to reverse the sense of each relay individually.  The outputs are solder pads along the top, just above the relays in the picture.  See below for the schematic.


Schematic of the SEQ-1 board. (See below for a larger schematic).