MFJ 7000 Instruction Manual

Model MFJ-7000

INSTRUCTION MANUAL

CAUTION: Read All Instructions Before Operating Equipment

MFJ ENTERPRISES, INC.

VERSION 1A

300 Industrial Park Road

Starkville, MS 39759 USA

Tel: [phone] Fax: [phone]

COPYRIGHT 2009 MFJ ENTERPRISES, INC.

C

MFJ-7000 EmComm Emergency Communications System Instruction Manual

Introduction

The MFJ-7000 is an all in one box built for the Icom IC-7000 transceiver that allows it to become
a emergency communication station. Just connect the antenna of your choice and a power source
and you are ready to operate. The built in voltage conditioner allows full power SSB operation
from limited power source such as a vehicle accessory plug. The built in antenna tuner lets you
rapidly tune any antenna automatically: unbalanced or single-wire. MFJ's exclusive

InstantRecall

with more than 2500 non-volatile VirtualAntenna

The tuner includes a highly efficient switching L-network with wide matching capability, 1.8 to
30 MHz coverage, a radio interface port, and heavy-duty 10 amp/1000 volt relays. It is rated at
200 watts SSB/CW.

A maximum of 256 values of inductance and 256 values of capacitance are available. With the
capacitance switched between the input and output side, this provides a total of 131,072 L/C
tuning combinations. The nominal tuning ranges are 0 to 24 μH and 0 to 3900 pF.

The MFJ-7000
automatically adjusts for minimum SWR and remembers the frequency and tuner settings, safely
stored in non-volatile memory. The next time you operate on that frequency (or close to it), the
tuner settings are instantly restored and you’re ready to operate in milliseconds.

When you push the tune button, MFJ’s InstantRecall

operated on that frequency before. If so, tuning is instantaneous and you’re ready to operate. If

not, MFJ’s IntelliTune

It measures the complex impedance of your antenna. Next, it calculates the components it needs
and instantly snaps them in. Finally, it fine-tunes to minimize SWR, and you’re ready to operate-

-all in a fraction of a second.

If the antenna impedance is not within the tuner’s measurement range, MFJ’s AdaptiveSearch

algorithm goes into action. Frequency is measured and relevant components values are
determined. Only those values are searched for fast tuning. If it still cannot find a match, the
search is performed again using a different search pattern.

The tuners enter a “sleep” mode when idle and when no transmit signal is present, turning off the
microprocessor clock to avoid the generation of spurious signals.

TM

, IntelliTuneTM and AdaptiveSearch

learns and remembers. When you push the tune button on the IC-7000, it

TM

algorithm (based on MFJ’s famous SWR Analyzer technology) kicks in.

TM

algorithms give you fast automatic tuning

TM

memories. .

TM

checks its memory to see if you have

TM

2011 MFJ Enterprises, Inc.

MFJ-7000 EmComm Emergency Communications System Instruction Manual

Features

• Onboard 3/8 HF antenna mount for use with mobile antennas.

• Coax connector for using external mounted antennas.

• Front mounted antenna selector switch.

• Independent tuner memories for each antenna port.

• Microphone storage slot under radio.

• Automatically matches antennas from 6 to 1600 ohms impedance (SWR up to

32:1)

• Tune in less than 15 seconds, usually less than 5 seconds

• Over 2500 non-volatile memories for tuner settings

• Highly efficient switching L-network matching circuit

•

Specifications

• Impedance matching range: 6 to 1600 ohms

• SWR matching range: up to 8:1 for < 50 ohms and up to 32:1 for > 50 ohms

• Capacitance range: 0 to 3961 pF nominal (256 values)

• Inductance range: 0 to 24.86 μH nominal (256 values)

• Relay rating: 10 amp 1000 volts

• Relay electrical life: 100,000 operations

• Relay mechanical life: 10 million operations

• Memory endurance: 1 million erase/write cycles

• Memory data retention: > 200 years

• Power requirements: 12 - 15 volts DC

† Specifications and design are subject to change without notice.

2011 MFJ Enterprises, Inc.

MFJ-7000 EmComm Emergency Communications System Instruction Manual

Fast Start

WARNING

● Never operate Onboard HF and VHF/UHF antenna at the same time. This
will damage your transceiver.

● Do not touch the 3/8 antenna or antenna mount or the counterpoise wire
when transmitting on this port. Serious RF burns can result.

● Disconnect all antennas from the MFJ-7000 during lightning storms.

● Always tune with low power (2-10 watts) by pushing the tune button on the

IC-7000. Apply maximum power only after tuning up.

● Do not transmit with a high SWR for extended periods of time.

1. The MFJ-7000 comes pre-assembled at the factory for easy initial setup. You will
need only a #2 Phillips screwdriver to mount your radio.

2. Remove the front radio cover, the handle plate and the access plate on top of the
unit. You will use the Icom supplied mounting screws that came with your radio
to secure it into the MFJ-7000. Disconnect the microphone and face of the radio

2011 MFJ Enterprises, Inc.