MFJ-1795 Vertical Antenna
Instructions
1
MFJ-1795 Vertical Antenna
INTRODUCTION
The MFJ-1795 HF antenna was designed to provide portable or permanent 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 40, 20, 15 and 10 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
Power
Bandwidth
CW
SSB
RTTY
40m
700
1500 500
100KHz
20m
1250 1500 750
400KHz
15m
1250 1500 1000
1800KHz
10m
1250 1500 750
1200KHz
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.
