MFJ 264 - User Manual

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MFJ-264 Dr

Dumm

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

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

resistor can be avoided.

2. 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

SPECIFICATIONS

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

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

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Summary

MFJ-264 Dummy Load Instructions

Operation Instructions

How to operate the MFJ-264 dummy load, including connection and avoiding overheating.

Technical Specifications

Key technical specs like impedance, power dissipation, voltage gradient, operating temp, and frequency range.

Power Load Warning

Critical warning against exceeding power load limits to prevent permanent resistor damage.

MFJ 12-Month Limited Warranty

Warranty Coverage and Claims

Explains warranty coverage, requirements for claims, repair/replacement policy, and contact information.