MFJ Enterprises MFJ-1886TR User manual

CAUTION: Read All Instructions
Before Operating Equipment
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: [phone] Fax: [phone]
COPYRIGHT 2015 MFJ Enterprises Inc.
MFJ-1886TR
Receive Loop Antenna
INSTRUCTION MANUAL
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Introduction
Thank you for purchasing the MFJ-1886 receive loop antenna. You new antenna is composed of
High strength material for excellent rigidly and light weight. The MFJ-1886 is compact and excellent
for restricted space or portable installations. The MFJ-1886 antenna frequency range extends from 30Mhz
all the way down into the 500 Khz AM Broadcast bands The antenna has strong null points and a rotator is
recommended for seeking out weak stations by eliminating noise or other stations. It can be mounted on
a tripod for temporary locations or any mast 1-3/4 diameter or smaller for permanent installation.
Preparation
This antenna is fully assembled and ready to mount. Pick a mounting location well away from any
other transmitting antennas. Transmitting signals close to the MFJ-1886TR will damage the internal
amplifier. This antenna can be used indoors if desired. Rotating the antenna by hand is a good way
to null noise or other broadcast stations in the area. Indoor locations tend to have more noise sources
than outdoor locations so keep that in mind if you decide to use the antenna inside.
WARNING
KEEP THIS ANTENNA
AWAY FROM POWER LINES
Never mount or move any antenna where it can come into contact
with power lines. If this antenna comes into contact with power
lines, it can KILL you. Never mount any antenna where if it falls
it could come into contact with power lines.
In the box
1. Loop Antenna
2. TR Bias Tee
3. Power Supply
4. U-bolts
ON
OFF
Bias-Tee with
Transmit/Receive
Antenna Switch
MFJ-4113TR
POWER
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Mounting
Customer supplied tripod or mast
Use the two supplied u-bolts
to secure the loop to your
mast as shown. Your mast
should be no more than
1-3/4 in diameter and should
be sturdy enough to support
the MFJ-1886 antenna.
Side view
Transmit Antenna
XCVR
ANT
KEY Line
DC PASS
LOOP ANTENNA
Line
1. Connect a coax jumper between the
transceiver and the TRANSCEIVER jack.
2. Connect the Transmit Antenna to the XMIT
ANTENNA jack.
3. Connect the coax betweel the MFJ-1886 Loop
and the LOOP ANTENNA DC-PASS jack
4. Connect and RCA cable between the KEY jack
and the KEY output on the transceiver. This
may be labeled SEND or may be on a jack
labeled REMOTE or ACCESSORY. This is the
line that would be used to key a linear amplifier.
5. Connect up the 12VDC power source that
came with the MFJ-1886.
1
2
3
4
5
Wiring
What You Will Need
1. Coax Jumper between the Switch Box and
the transceiver
2. Coax jumper between the Loop and the
Switch Box.
3. Transmit Antenna.
4. Interface cable to run between the KEY
input and the transceiver Send output.
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Connections
Operation
12VDC
TRANSCEIVER
XMIT ANTENNA
LOOP ANTENNA (DC PASS)
KEY
Connect your linear supply included with the MFJ-1886TR to this port. The power requirements
are 12-14VDC at 500mA.
RF input from your transceiver.
The terminal for the transmit antenna. When off or power is removed the transceiver is
connected to the transmit antenna.
The loop antenna is connected to this port. Do not short the center pin to ground or add a balun
with continuity to ground to this port.
RCA terminal to connect to the SEND or KEY output of the transceiver. This is usually the
connection used to key an amplifier. Check your radio manual for the proper connections.
When off the transmit antenna is selected by default.
When ON the Loop Antenna is connected to the transceiver.
When the KEY line is shorted to ground the transmit antenna is selected and the power is
disconnected from the loop amplifier.
?
?
?
ON
OFF
Bias-Tee with
Transmit/Receive
Antenna Switch
MFJ-4113TR
POWER
LOOP
ANTENNA
DC PASS
KEY
XMIT ANTENNA
TRANSCEIVER
-
+
12VDC
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Operation
NULL
NULL
MAX MAX
View from top side of loop
Inside or outside the operation of the antenna is basically the same. Rotation of the
antenna is important so turning it by hand or with a rotator will increase the effectiveness
of receiving distant stations.
Two null points on the antenna will allow directional receiving. This means
noise or other interference can be reduced by placing the noise source in the
direction of the null point. It is not necessary for you to know which direction the antenna
is pointed, simply rotate the antenna until you hear the noise go away or it is greatly reduced.
You may not be able to null close or very strong stations because their signal may be coming
from multiple directions ( bouncing around ). When you null a station, it allows you to
hear other signals that are on or close to the same frequency as the nulled station. You
may be able to hear stations that you were not able to hear before.
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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.
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