Yaesu FT-2FB Instruction Manual page 6

For mobile operation, the DC power is supplied by
the vehicle battery and charging system.
The transceiver will operate over a voltage range
of 10.5 to 14 volts DC. It is necessary to carefully
adjust the charging system so that the upper limit
of 14 volts is never exceeded.
UNDER NO CIRCUMSTANCES, SHOULD
THE TRANSCEIVER BE OPERATED FROM
A POWER SOURCE WHICH EXCEEDS 14
VOLTS. DAMAGE TO THE TRANSISTORS
MAY OCCUR IF EXCESSIVE VOLTAGE
IS APPLIED.
For vehicle installation, it is recommended that the
power cord supplied should be used and run di-
rectly to the shortage battery for both positive (red
cable) and negative (black cable) terminals.
MOUNTING
The FT-2FB is supplied with a mounting bracket
and DC power cord including a fuse holder.
The bracket should be fastened to the mounting
surface with sheet metal screws. When the trans-
ceiver is mounted under the dashboard of a vehicle,
keep the air path free from the vehicle's heater duct.
Mount the transceiver away from the vehicle's
heater system to prevent destruction of components.
Once the unit is in place in the bracket, tighten the
knurled screws on the sides to secure the trans-
ceiver in the desired position. Connect the micro-
phone, power cable and antenna cable to the trans-
ceiver.
In some applications, vertical mounting may be more
convenient. The FT-2FB transceiver may be mount-
ed in any position without change in performance.