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MFJ 264 Quick Start Manual

Dry dummy

MFJ-264

MFJ-264 DUMMY LOAD INSTRUCTIONS

The MFJ-264 is a dry air-cooled resistive dummy load. This resistor load is capable of handling

high short-term RF loads. A reasonable cool down period is needed to keep the resistor from

becoming permanently damaged. The cool down period needs to be about 10 to 20 tines the load

usage. The load can be temporarily immersed in clean water to speed up cool down tine.

Thoroughly dry the load by blowing forced air through it before using it again. Never operate

this load while it is immersed in any liquid.

OPERATION

Become familiar with the POWER CAPABAILITY curve so that overheating of the

resistor can be avoided.

Connect the transmitter to the input of the dummy load. Use a PL-259 connector.

NOTE:

Do not let the dummy load resistor get hot enough to glow red. If the dummy

load resistor starts to glow red, turn the transmitter off immediately and allow

650 MHz

POWER DISSIPATION: 1500 Watts for less than 10 seconds. 100 Watts for 10 minutes

VOLTAGE GRADIENT: 10 kV / inch

OPERATING TEMPERATURE: Up to 350'C

FREQUENCY RANGE: 1-650 MHz; usable to 750 MHz

IMPEDANCE: 50 OHMS VSWR: Less than 1.3:1 at less than

Dry Dummy

Table of Contents

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Page 1 Dry Dummy MFJ-264 DUMMY LOAD INSTRUCTIONS The MFJ-264 is a dry air-cooled resistive dummy load. This resistor load is capable of handling high short-term RF loads. A reasonable cool down period is needed to keep the resistor from becoming permanently damaged. The cool down period needs to be about 10 to 20 tines the load usage.
Page 2 Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned. Wired and tested PC boards installed in the owner's cabinet or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at the owner's expense unrepaired.

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