MFJ MFJ-1456 User manual

12 MONTH LIMITED WARRANTY
MFJ Enterprises, Inc. Warrants to the original owner of this product, if manufactured by MFJ Enterprises,
Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from defects
in material and workmanship for a period of 12 months from date of purchase provided the following
terms of this warranty are satisfied.
1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, credit card or
money order receipt, etc.) describing the product to establish the validity of the warranty claim and
submit the original or machine reproduction of such proof-of-purchase to MFJ Enterprises, Inc. at
the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to deny warranty
without dated proof-of-purchase. Any evidence of alteration, erasure, or forgery shall be cause to
void any and all warranty terms immediately.
2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ’s option without charge to the original
owner any defective product under warranty, provided the product is returned postage prepaid to
MFJ Enterprises, Inc. with a personal check, cashiers check, or money order for $7.00 covering
postage and handling.
3. MFJ Enterprises, Inc. will supply replacement parts free of charge for any MFJ product under
warranty upon request. A dated proof-of-purchase and a $5.00 personal check, cashiers check, or
money order must be provided to cover postage and handling.
4. This warranty is NOT void for owners who attempt to repair defective units. Technical consultation
is available by calling [phone].
5. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.
6. Wired and tested PC board products are covered by this warranty provided only the wired and tested
PC board product is returned. Wired and tested PC boards installed in the owner’s cabinet or
connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at the
owner’s expense unrepaired.
7. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to person or
property by the use of any MFJ products.
8. Out-of-warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty product provided the
unit is shipped prepaid. All repaired units will be shipped COD to the owner. Repair charges will be
added to the COD fee unless other arrangements are made.
9. This warranty is given in lieu of any other warranty expressed or implied.
10. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or manufacture
without incurring any obligation to install such changes upon any of the products previously
manufactured.
11. All MFJ products to be serviced in-warranty or out-of-warranty should be addressed to MFJ
Enterprises, Inc., 300 Industrial Park Road, Starkville, Mississippi 39759, USA and must be
accompanied by a letter describing the problem in detail along with a copy of your dated proof-of-
purchase.
12. This warranty gives you specific rights, and you may also have other rights, which vary from state to
state.
MFJ-1456
Multi-Band Mobile Antenna
Instruction Manual
Thank you for purchasing the MFJ-1456, Multi-Band Mobile
Antenna. Please read this instruction manual completely and
thoroughly before using the MFJ-1456.
Specifications:
• Bands: 40-Meter, 20-Meter, 15-Meter, 10-Meter, 6-Meter, 2-Meter, and 440
MHz
• Maximum Power
HF – 200W SSB
6M – 200W SSB/100W FM
2M/70cm – 100W FM
• SWR
HF – 1.6:1 or less
6M-70cm – 1.5:1 or less
• Gain and Phasing
HF – 0 Gain, ¼ Wave
6M – 0 Gain, ¼ Wave
2M – 2.15 dBi Gain, ½ Wave
70cm – 5.5 dBi Gain, 5/8 Wave X 2
• Connector: PL-259
• Fold-over feature with threaded collar.

Installation Instructions:
• Select a suitable mount for the MFJ-1456. The MFJ-345S and
MFJ-348S trunklip mounts or the MFJ-336S Goliath triple mag-
mount are recommended.
• Be sure the mount has a good connection to ground (this is
most important).
• Select the loading coils for the bands you want to operate. You
can operate 6-Meters, 2-Meters, and 440 MHz with no loading
coils. You can install one, two, three, or all four loading coils.
• It is recommended that the loading coil for the lowest frequency
band be installed vertically. If only using one loading coil, it is
recommended that the loading coil be mounted vertically. Simply
screw the loading coil into the top collar and tighten with a
wrench.
• Up to 3 loading coils can be attached horizontally. Simply screw
the desired loading coils into the horizontal mounting collars and
tighten with a wrench.
• Screw the MFJ-1456 onto your mount.
• For added support, it is strongly recommended that you guy the top
of the antenna.
Tuning
• The bandwidth on the HF bands is very narrow. Tuning may be
required depending on the part of the band you want to operate.
• To adjust the frequency, each loading coil has a whip that can be
adjusted.
• For operating at the top of the band, it may be necessary to cut one
or both stubs.
• Use the hex key supplied to loosen the setscrew, and adjust the
whip length.
• Tighten the setscrew securely after tuning is complete.
Notes:
• Tuning this antenna for one band will affect the tuning on all other
bands. It is suggested to start the tuning process with the 10-Meter
coil, 15-Meter coil, 20-Meter coil, and finally the 40-Meter coil in
this order. Then go back and recheck the tuning on the other coils.
It may take 2 or 3 passes of checking and re-checking before
achieving the perfect tuning you desire.
• Be careful if you have to cut the whips to tune this antenna, it is
recommended not to exceed increments of 0.1 inches.
• This antenna is very sensitive. You may find that switching
vehicles adversely affects the operation. It may be necessary to re-
tune the antenna when switching vehicles.
• You will need a duplexer or triplexer between your transceiver and
the MFJ-1456.
Fold-Over Feature
• Unscrew the threaded collar at the base of the antenna.
• Lift the antenna up until the hinge is revealed.
• Gently fold the antenna over in a suitable position for temporary
storage.
Warning:
• Do not touch the antenna while in use.
• Place the antenna in a location away from people. Serious RF
burns may occur if a person comes in contact with the antenna.
• NEVER INSTALL AN ANTENNA IN A LOCATION
WHERE CONTACT WITH POWER LINES IS POSSIBLE.
DEATH OR SERIOUS INJURY MAY OCCUR.