MOUNTING

The 70-1336 mounting bracket bolts onto the transceiver sides. It provides a 2.25" x 7.00" flat surface across the transceiver top, with holes for bolting to a even surface in the vehicle. 5/32" holes must be drilled in the mounting surface to accept the four 3/8" screws and washers provided.

POWER

• Connections

The 70-1311 Power/Accessory Cable is equipped with two unterminated 14 gauge wires two meters in length for connection to the vehicle electrical system.

Connect the black wire to the negative (-) chassis ground of the vehicle. DO NOT ATTEMPT TO INSTALL THE TRANSCEIVER IN A POSITIVE GROUND VEHICLE. A large bolt that screws into the metallic vehicle body or chassis often provides an adequate ground if a lug is used to secure the wire to it.

Connect the red wire to the positive (+) side of the vehicle electrical system. Because of current requirements, connection to an existing fused circuit should be avoided to prevent overload of that fuse. This wire has its own in-line fuse for protection against wire penetration and transceiver defect. The connection can be made to the ignition hot so that the transceiver switches on with ignition, or it can be made to battery hot to enable the last-selected-feature of the transceiver (the transceiver must be turned off separately). Either connection is usually available in the vehicle fuse block if the red transceiver wire is terminated with an appropriate lug.

• Requirements

CAUTION: Check the voltage source before connecting the power cable. Too much voltage (above 16V) can severely damage the transceiver.

The transceiver is shipped with a 2 m Power/Accessory cable. Each cable includes fused power leads for connection to the vehicle electrical system. Because the transceiver chassis is connected to the negative (-) lead, DO NOT INSTALL THE TRANSCEIVER IN A POSITIVE GROUND VEHICLE. If the transceiver is used as a base station, the external AC-line-to-DC power supply must be adequately regulated and have sufficient current capacity.

ANTENNA

The communications system component that can affect overall performance the most is the antenna. A good quality antenna designed to provide 50 Q terminating impedance at appropriate transceiver frequencies is recommended. When adjusting the antenna, be sure to follow its manufacturer's instructions. A better quality SWR meter should be used to accurately measure minimum reflected energy.

MICROPHONE HANGER

The hand microphone included with the transceiver has a button on its backside to mate with its hangup clip. The clip must be mounted with three screws in a location convenient to the operator. Three 1/2" screws and three 3/4" screws, each requiring a 5/64" hole, are also provided.

POWER ACCESSORY PLUGS

A 10-pin male Molex connector and a fused, 2 m power cable assembly (70-1311), mates to the power/accessory connector (J415) on the rear of the 70-1336. Extra pin positions are used for connection of optional devices not included with this assembly.

Optional devices can be connected to the Power/Accessory Plug by inserting Molex pins included with these devices into their respective vacant holes. See Figure 3 -1. Option connections are shown in lighter shade.

EXTERNAL SPEAKER

Normally, the transceiver internal speaker is connected to receive audio by the jumper to pins 5 and 6. If one of the MIDLAND external speakers is to be utilized, the jumper must be removed to disаble the internal speaker and the two wires from the external speaker must connect to pin 4 and 6.

NOTE: If the 70-2355 15 W External Speaker is to be connected, its input cable center conductor (white) must be connected to pin 6, and the shield (black) to pin 4.

HANG-UP BOX (Optional)

The 70-2195 Microphone Hang-Up contact/switch-box is installed to unmute CTCSS/DCS squelch when the microphone is lifted. The center conductor of the shielded hang-up box cable connects to pin 3, the shield to pin 2.

AUXILIARY DEVICES

Pins 1 and 8 are available for auxiliary connections necessary with certain optional features. Wiring details for these are found in the literature for the option.

ACCESSORY PINS:

16AWG : 70-150308 (MOLEX 39-00-0078)