MFJ MFJ-4726RC User Manual

MFJ-4726RC 6–Position Antenna/Transceiver Switch Remote Control
1
INTRODUCTION
Thank you for purchasing the MFJ-4726RC 6-Position
Antenna/Transceiver Switch Remote Control. This
Remote Control allows the user to remotely operate the
MFJ-4726 Desktop/Remote Antenna/Transceiver Switch,
which is a versatile multiple Antenna/Transceiver Switch
designed to switch up to six 50-ohm antenna systems or six
transceivers in any combination. It handles high power, up to
1500 Watts and sealed relays offer excellent life and
connection reliability. The unit is operational from 1-60 MHz
and useable to 150 MHz.
The MFJ-4726RC 6-Position Antenna/Transceiver Switch
Remote Control uses two simple rotary switches to select
one-of-six antennas or six transceivers in any combination.
Place the MFJ-4726 Desktop/Remote Antenna/Transceiver
Switch out-of-way under your desk or in another room and
use a remote control. In the OFF/Remote position, all inputs
are grounded or control is transferred to the MFJ-4726RC
Remote Control. All unused inputs are grounded. You can
connect a sense line to your transceiver so when it’s off all
inputs are automatically grounded.

MFJ MFJ-4726RC Specifications

General

Brand	MFJ
Model	MFJ-4726RC
Category	Remote Control
Language	English

Summary

Introduction to MFJ-4726RC Remote Control

Installation Guide

Unit Placement and Grounding

Describes ideal location, moisture avoidance, and station grounding for the unit.

Connecting Antennas

Details connecting up to six antennas via SO-239 connectors, noting numbering.

Connecting Transceivers

Explains connecting transceivers to SO-239 connectors labeled A-F, noting labeling.

Feedline and Grounding

Covers connecting the main feedline and station ground to dedicated connectors.

Remote Control Connection

Outlines using RJ-45 jacks and CAT-5 cables to connect the remote control.

Radio Sense Jack Integration

Describes connecting a Radio Sense jack via RCA for automatic grounding when the transceiver is off.

Operation Procedures

Power Supply Connection

Details connecting a 12-15 VDC, 300mA power supply, emphasizing polarity sensitivity.

Initial Switch Settings

Instructs to set the main unit switch to OFF/Remote before operating the remote control.

Antenna and Transceiver Selection

Explains using rotary knobs on the remote to select desired antenna and transceiver combinations.

Hot-Switching Warning

Crucial warning against switching antennas while RF power is applied to prevent damage.

Technical Assistance and Support

Troubleshooting Steps

Advises checking the manual first, then contacting MFJ Technical Service for assistance.

Contact Information

Provides phone numbers, mailing address, fax, and email for technical inquiries.