REARPANELCD GNDterminal ...Connect a heavy gauge wire or copper strap betweenthe GND terminal and the nearest earth ground.(g) ATconnectorMates with the connector on the cable supplied with theoptional KAT-1or MAT-100ExternalTuner.CID ANTconnectorConnect the feed line from your 50 Q antennato thisconnector. Mates with a PL-259 male connector.@ Power Input DC13.6V connectorConnect a 13.6 V DC power source. Use the suppliedcable with a regulated DC power supply.@ ALCjackUsed for connecting the Automatic Level Controlvoltageto an external linear amplifier. Mates with an RCA pinplug.@ RELAYjackProvides a ground on transmit. The relay contactcapacity is 30 V DC / 0.5 A. Mates with an RCA pinplug.(]) CWKEYjackUsed for connecting a key for CW operation. Mateswith a 6.0 mm (1/4")2-conductorplug. Externalelectronickeyers must use positive keying to becompatiblewith this radiotelephone. Use a shieldedcable betweenthe key and the radiotelephone. Openterminal voltage is approximately5 V DC.@ VOX!ANTI!DELAYcontrolsUsed for adjustingthe Voice-operatedTransmit (VOX)function.@ EXTSPjackUsed for connecting an external4 - 8 Q speaker.Mates with a 3.5 mm (1/8")diameter, 2-conductor(mono)plug. Connectingan external speaker cuts offthe audio automaticallyto the internal speaker.@> ACC2 connectorMates with an 8-pin male DIN connector for connectingvarious accessoryequipment.@ ACC1 connectorUsed for connectingthe optionallF-232C Interface Unit.This unit allows radiotelephonecontrol from a computer.Mates with a 6-pin male DIN connector.5