MFJ-1742 20 Meter Double Extended Zepp Instruction Manual
3
or rope from breaking when the trees sway in the wind. It is also possible to use
masts, towers, or other tall structures for supports. Try to keep the ends of the
antenna at least five feet from metallic supports.
100 feet of high-quality 450-ohm balanced feedline is provided and can be
shortened if desired. Keep in mind that changing the length of feedline in a
balanced antenna system can change the tuning characteristics of the system.
Usually, a good antenna tuner will easily adjust to these changes. Occasionally,
it may be necessary to add or remove a small amount of feedline, especially, in
the case of this antenna, if it is desired to use it on bands other than 20 meters.
This antenna
will not
work as an extended double zepp on 20 meters if it is
erected “inverted vee” or “sloper” fashion, at least not to textbook standards. It
should be as straight and level and possible.
Maintenance
This antenna is made of heavy duty materials and should withstand normal
climates for many years. General Electric makes a pure silicone grease called
"
silicone dielectric compound
" that can be applied
sparingly
to the connections
at the antenna’s center insulator. This is the same type of sealer that commercial
antenna installers and CATV companies use with great success.
A less desirable but adequate sealer is the automobile seam sealer commonly
marketed as "coax seal,” a pliable black sealing compound.
Technical Assistance
If you have any problem with this unit first check the appropriate section of this
manual. If the manual does not reference your problem or your problem is not
solved by reading the manual you may call
MFJ Technical Service
at
662-323-
0549
or the
MFJ Factory
at
662-323-5869
. You will be best helped if you have
your unit, manual and all information on your station handy so you can answer
any questions the technicians may ask.
You can also send questions by mail to MFJ Enterprises, 300 Industrial Park
Road, MS 39759; by FAX to
662-323-6551
; or by email to
[email protected]. Send a complete description of your problem, an
explanation of exactly how you are using your unit, and a complete description
of your station.
