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MFJ-4416B Super Battery Booster
Instruction and Technical Manual
3
INTRODUCTION & FEATURES
INTRODUCTION
The MFJ-4416B Super Battery Booster is designed with the serious mobile operator in
mind. In the mobile environment low battery voltage can cause output signal distortion,
output power problems and even transceiver resetting. This low voltage occurs in two
ways. First – even low resistance wiring can result in noticeable voltage drop. And
second when you turn off your vehicle or remove a typical battery from the charger, the
battery voltage can drop from the nominal 13.8 volts to 12 volts after a short period of
time. With this in mind the MFJ-4416B Super Battery Booster corrects all of these
problems. With its high efficiency boost regulator circuitry, it will maintain the desired
13.8 volts at up to 25 amps peak from voltages as low as 9 volts.
FEATURES
Choice of Input and Output Connections:
No need to fumble around looking for
connectors. The MFJ-4416B gives you a choice of Anderson PowerPole
TM
connectors or
5-way binding posts on the input and output.
Adjustable Output Voltage:
User adjustable output voltage. Factory set at 13.8 volts
this voltage is adjustable anywhere from 12 to 13.8 volts. When setting the voltage at 12
volts, input voltages greater than 12 volts pass through, but the efficiency is greater.
Typically saving over 30 watts in heat dissipation during transmit.
Selectable Minimum Input Voltage:
You have the choice of the minimum input
voltage the MFJ-4416B will operate on. Set from the factory at 10 volts you can select 9
or 11 volts. This keeps you from possibly over discharging your battery and damaging it.
It is even latchable so once the voltage drops the Boost Regulator stop until you remove
the power from the unit.
Audio Alert Feature:
When enable instantly alerts you when the input voltage drops
below the preset level.
RF Sampling Port:
Feed RF from your radio’s antenna line with a “T” connector and
the unit will automatically sense when the high current demands of transmitting are
required so no regulator switching efficiency penalties are incurred during receive.
Adjustable RF Delay:
Adjustable Delay Circuit. Adjust from .1 to 10 seconds delay
after removal of RF from the circuit. Great when using the MFJ-4416B for different
modes of operation.
Remote Jack:
Allows sampling of the Input Voltage and the Output Voltage. Also
allows for control of the Boost Switch and has an active low output for the Low voltage
alarm. Direct connection to the MFJ-4416RC Remote Unit.
