MFJ MFJ-4416 User Manual
Super Battery Booster
Model MFJ-4416
VERSION 0A
INSTRUCTION MANUAL
CAUTION: Read All Instructions Before Operating Equipment
MFJ ENTERPRISES, INC.
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-5869 Fax: 662-323-6551
COPYRIGHT 2007 MFJ ENTERPRISES, INC.
C
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MFJ-4416 Super Battery Booster Instruction and Technical Manual
TABLE OF CONTENTS
TOPIC PAGE
1. TABLE OF CONTENTS 2
2. LIST OF FIGURES AND TABLES 2
3. INTRODUCTION AND FEATURES 3
4. TYPICAL SPECIFICATIONS 4
5. SYSTEM CONTROLS AND INDICATORS 4
a. TOP INPUTS AND OUTPUTS 4
b. SIDE PANEL CONTROLS AND INPUTS 5
6. INTERNAL HEADER AND VOLTAGE CONTROL 6
7. THEORY OF OPERATION 7
8. TYPICAL EFFICIENCY 8
5. MFJ-4416 EASY-START INSTRUCTIONS 9
6. IN CASE OF DIFFICULTY 10
7. TECHNICAL ASSISTANCE 10
LIST OF FIGURES
Figure 1 Top Inputs and Outputs 4
Figure 2 Side A Controls and Indicators 5
Figure 3 Side B Jack 5
Figure 4 Internal Headers and Voltage Adjust 6
Figure 5 Block Diagram 7
Figure 6 Schematic Diagram 11
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MFJ-4416 Super Battery Booster Instruction and Technical Manual
INTRODUCTION & FEATURES
INTRODUCTION
The MFJ-4416 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-4416 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-4416 gives you a choice of Anderson PowerPoleTM 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-4416 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.
RUGGED CONSTRUCTION - Attractive all-metal cabinet, conservative component
selections ensure solid performance for years to come. Fully covered by MFJ’s “No
Matter What” one year limited warranty.
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MFJ-4416 Super Battery Booster Instruction and Technical Manual
SYSTEM CONTROLS AND INDICATORS
TYPICAL SPECIFICATIONS
Output Current…………………………25 Amps Peak
Output Voltage …………………………13.8 Volts at 9-13.8 volts input.
Before attempting to operate your MFJ-4416, please read the manual thoroughly. It
contains important details about setting up your unit to obtain the best performance.
Top Inputs and Outputs:
Figure 1: MFJ-4416 Top Inputs and Outputs
1. 5-Way High Power Binding Post Negative Input.
TM
2. Anderson PowerPole
Negative Input.
3. Anderson PowerPole
TM
Positive Input.
4. 5-Way High Power Binding Post Positive Input.
5. 5-Way High Power Binding Post Positive Output.
6. Anderson PowerPoleTM Positive Output.
TM
7. Anderson PowerPole
Negative Output.
8. 5-Way High Power Binding Post Negative Output.
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