MFJ-61xx Instruction Manual End Fed Zepp Antenna
1
INTRODUCTION
The MFJ version of the classic
End-fed Zepp
consisting of one ½ wave radiator and ¼ wave stub
is an antenna that delivers better than average transmitted signals even when installed at only ~¼
wavelength, above and it is directly-fed with any length of 50-Ohm coax. With the exception of
40-meter coverage (~150-200 kHz) no tuner is necessary for 15-20 meter operation with low
SWR across the band.
A further consideration is that this antenna is also quiet, when compared to inverted “V’s” (and
verticals, especially). A reduction of 2 – 3 “S” units of noise may make the difference in that
DX contact you can now hear above the noise!
End-feeding a half wavelength of wire has certain mechanical advantages over center-feeding
the same length of wire. It can be erected in limited space situations where a center-fed antenna
is not possible.
The added bonus: you can virtually “
hang & play
” this antenna as we construct them. No
tuning, trimming, etc. required. Just follow the easy installation instructions and suggestions, the
warnings, and you’ll be “up and running” in no time flat, and capturing DX, while receiving
signal reports as never before using lesser antennas.
Once connected, you’ll find the MFJ 61xx End-fed Zepp presents a low SWR across the entire
band. However, it is a “
one-band antenna
” depending which band you chose. Figure 1 is a
generic illustration of the antenna with its shorted stub and coaxial connection.
Warnings
•
Always mount or install antennas beyond the reach of adults and
children. Make certain your antenna installation meets RF
exposure guidelines
•
Contact with exposed parts of this antenna system can cause RF
burns and other injuries.
•
Constructing or erecting antennas where they may contact
electrical power lines can result in injury or even death
INRADIO
ABEL & PRO-FIT Centrum Radiokomunikacji
tel.
fax:
e-mail:
internet:
ul. Puszkina 80
92-516 £ódŸ
Poland
(+42) 649 28 28
(+42) 677 04 71
www.inRADIO.pl
Autoryzowany Przedstawiciel MFJ w Polsce:
