MFJ-1026 Instruction Manual
Deluxe Noise Canceling Signal Enhancer
10
Noise Antenna
Please be sure to read the section titled "Theory of Operation" Page 2 of this manual. It contains many
helpful suggestions on antenna selection and installation.
The noise antenna can be a special antenna, or simply a spare antenna not in use at the moment. When
nulling local noise, the best antenna would be one located close to the noise source that "hears" the noise
much better than any desired signals.
LAMP1 is a 50 mA 12 volt dial lamp used to protect the AUXILIARY ANTENNA input from excessive
voltage. Excessive voltage from the transmitter can, under extreme conditions, burn out LAMP1.
Illumination or failure of LAMP1 (located near the AUXILIARY antenna jack) indicates excessive RF
voltages have appeared at the AUXILIARY ANTENNA connector. If LAMP1 illuminates or burns out,
discontinue using that particular AUXILIARY antenna or relocate it further from the transmitting
antenna.
Use with Beverage or Other Low Noise Antennas
The MFJ-1026 can be used to enhance reception on 160 and 80 meters, even if the station already
employs low noise directional receiving arrays. If the receiving antennas connect to the receiver through
a special receiving antenna input connection (a receive antenna jack), the MFJ-1026 should be inserted
in that lead.
A suggested method follows:
1. Connect the MFJ-1026 RADIO connector to the receiver's input line.
2. Connect the MFJ-1026 AUXILIARY ANTENNA connector to the noise, Beverage , or other similar
low noise receiving antenna.
3. Connect the MFJ-1026 MAIN ANTENNA connector to another Beverage or another low noise
receiving array (in some cases even the transmitting antenna can be used to augment the Beverage's
signals) .
Note:
The AUXILIARY ANTENNA input has different gain distribution than the MAIN ANTENNA
input. The MAIN ANTENNA input has less internal noise, but also has less available gain than
the AUXILIARY ANTENNA input. NEVER swap these connection if transmitter RF is applied
to the MFJ-1026. In some cases (where the transmitter's RF is not applied through the MFJ-
1026), weak signal performance may be improved by swapping MAIN and AUXILIARY
antenna inputs.
