MFJ-1775W Rotatable Mini-Dipole
Instruction Manual
2
MFJ-1775W 4-Band Rotatable Mini-Dipole
Introduction
The MFJ-1775W is a mini 14-foot rotatable dipole that is almost invisible from across the street. With its
tiny 7-foot turning radius, it fits on the smallest roof and is perfect for town houses, apartments and
condos. If necessary, it can even be mounted inside an attic!
The MFJ-1775W is inconspicuous and low profile -- not much bigger than a TV antenna, and can easily
be turned by a lightweight TV rotator such as the Hy-Gain AR-35.
And this antenna is no wimp! Its bi-directional pattern can help reduce QRM/noise while maximizing
your signal in the directions that you want -- so you can work some real DX. You can operate 4 bands --
60, 30, 17, 12 meters -- and run up to a full 1500 Watts SSB on all HF bands.
The MFJ-1775W features automatic band switching, and uses highly efficient end-loading with its entire
length always radiating.
Each HF band uses separate, efficient end-loading coils wound on fiberglass forms with Teflon
TM
wire,
and capacitance hats (no lossy traps).
The MFJ-1775 is built-to-last – using an incredibly strong, solid fiberglass rod center insulator and 6063
T-6 aircraft strength aluminum tubing for the radiator. And it assembles in an afternoon.
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.
SPECIFICATIONS
The small size of the MFJ-1775W is accomplished by adding separate loading coils and capacitance hats
at each end of the antenna for the HF bands. The efficient end-loading coils are wound on fiberglass
forms.
Electrical Specifications
Power
Band
CW SSB
2:1 SWR BW
60m
1500 1500 40 KHZ
30m
1500 1500 60 KHZ
17m
1500 1500
400
KHZ
12m
1500 1500 1.2 MHZ
