MFJ-1795W Vertical Antenna Instruction Manual
INTRODUCTION
The MFJ-1795W HF antenna was designed to provide portable or permanent WARC Band
operation from restricted locations. When combined with the MFJ
Ground-Coupled
™ Portable
Antenna Base or other suitable grounding system, such as radial system, the result is a small
vertical antenna under 10 feet in height.
The reduction in size is accomplished by adding separate loading coils and capacitance hats for
each band at the top of the antenna. The efficient end loading coils are wound on fiberglass
forms. The high quality materials and construction of the HF loading system allows a maximum
power rating of 1500 watts SSB PEP on 60, 30, 17 and 12 meters.
The power rating of this antenna varies from band to band. The PEP ratings are primarily
determined by the voltage breakdown of the components, while the CW ratings are generally
determined by the components heating.
The following chart lists the power rating and the 2:1 VSWR bandwidth of this antenna:
Band (Meters)
Power (Watts)
Bandwidth (KHz)
CW SSB RTTY
60m
700
1500 500
100
30m
1250 1500 750
300
17m
1250 1500 1000
1000
12m
1250 1500 750
2000
The weight and wind load of this antenna are 10 pounds and approximately two square feet
respectively.
WARNING: Improper installation and assembly can be hazardous! Read
these instructions thoroughly before attempting to assemble, install, or
operate this product! High power transmitting devices produce voltages that
can cause severe burns or other injuries.
CHOOSING A LOCATION FOR THE ANTENNA
The best performance on receiving and transmitting will be obtained by mounting the antenna in
a clear location above or away from buildings, towers, feed-lines, utility wires, and other
antennas. While your own ingenuity and particular circumstances will determine the final
mounting method, we will pass along a few ideas for both permanent and portable installation.
WARNING:
Always mount this antenna so that it is out of the reach of adults as well as
children. The capacitance elements can cause injury and or severe RF burns.
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