Yaesu FT-7800R Operating Manual

Also see for FT-7800R: Brochure & specs Technical supplement

15FT-7800R OPERATING MANUALANT JackConnect your antenna here, using a type-M (PL-259) plug and coaxial cable.Cooling FanThe cooling fan rotates during transmission, and for 30 seconds after the radio returnsto the receive mode after transmitting.When the RF power amplifier’s heat sink reaches a moderately high temperature, thecooling fan will rotate automatically even if the radio is in the receive mode.DATA JackThis 6-pin mini-DIN connector provides simple interfacing to a packet Terminal NodeController (TNC) for 1200 bps or 9600 bps operation. The pin connections are shownon page 10.EXT SP JackThis 2-conductor, 3.5-mm mini phone jack provides audio output for an optional speaker.The optimum load impedance is 8 Ohms. Inserting a plug into this jack disables theaudio path to the transceiver’s internal speaker.13.8V DC Cable Pigtails w/FuseThis is the DC power supply connection for the transceiver. Use the supplied DC cableto connect this pigtail to the car battery or base station DC power supply capable of atleast 9 Amperes (continuous duty). Make certain that the Red lead connects to the Posi-tive (+) side of the power source, and that the Black lead connects to the Negative (–)side of the power source.REAR P ANEL C ONNECTIONS13.8VDCANTEXT SPDATA