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MFJ-1020C Active Antenna 

 

Owner's Manual 

MFJ-1020C    ACTIVE ANTENNA 

 

FEATURES 

 
The compact MFJ-1020C Active Antenna provides amplified reception of 
broadcast, short wave, or amateur radio signals from 300 KHz to 40 MHz.  It 
can be used with the supplied telescoping antenna or with an external wire 
antenna of your choice.  The MFJ-1020C provides gain, selectivity, and better 
reception, both at home, and as a portable unit in the field. 
 

SPECIFICATIONS 

 

Front Panel Indicators 

ON/OFF............................ LED mounted on the front panel (activated when a 

band is selected with the Band switch). 

 

Front Panel Controls 

Gain Control..................... Adjusts Gain from -10 dB to +10 dB 
Bypass Switch .................. Selects bypass mode 
Band Switch ..................... Six Position for OFF and 5 Bands from .3 MHz to 40 

MHz 

Tune Control .................... Maximizes the Gain for each of the 5 Bands 

 

Rear Panel Connectors 

Input ................................. SO-239 Connector 
Output............................... SO-239 Connector 
AC Adapter IN ................. 9-12 VDC Input @ 45 mA (3.5 mm plug) 
Ground.............................. Wing-nut, rear panel 

 

Other 

Frequency Coverage......... 300 KHz to 40 MHz 
Antenna ............................ 20" Telescoping Antenna - mounted through hole in 

the top (connected to input SO-239 connector).  An 
external wire antenna plugged into the SO-239 input 
requires the removal of the telescoping antenna. 

Dimensions....................... 2.5” H x 6.4” W x 3.3” D 
Weight .............................. 1 lb. 
 

Summary of Contents for MFJ-1020C

Page 1: ...vated when a band is selected with the Band switch Front Panel Controls Gain Control Adjusts Gain from 10 dB to 10 dB Bypass Switch Selects bypass mode Band Switch Six Position for OFF and 5 Bands from 3 MHz to 40 MHz Tune Control Maximizes the Gain for each of the 5 Bands Rear Panel Connectors Input SO 239 Connector Output SO 239 Connector AC Adapter IN 9 12 VDC Input 45 mA 3 5 mm plug Ground Win...

Page 2: ...SS SWITCH Connects the Input SO 239 directly to the Output SO 239 3 TUNE CONTROL Optimizes Peak Tuning for each of the 5 bands 4 BAND SWITCH Power rotary switch that selects the 5 bands from 300 KHz to 30 MHz 5 POWER LED Illuminates when power is on REAR PANEL CONNECTIONS I N PU T PO W ER 9 12 VD C O U TPU T 6 7 8 9 MFJ ENTERPRISES INC STARKVILLE MS USA 6 POWER 3 5mm barrel connector for power to ...

Page 3: ... cover and into the spacer located on the PC board If you chose to use external wire antenna plug it into the INPUT SO 239 connector located on the back of the unit DO NOT HAVE BOTH ANTENNAS CONNECTED AT THE SAME TIME 2 Connect a cable from the output of the MFJ 1020C to your receiving equipment 3 Connect a wire 18 ga approx from the wing nut ground to the receiver ground which in turn should be c...

Page 4: ...e are removed or disappear Notes 1 Connection of the AC Adapter automatically disconnects the internal battery 2 Use a Heavy Duty 9V alkaline battery 3 Use only the amount of gain needed to receive the desired station 4 Never use an external antenna and the telescoping antenna at the same time TECHNICAL ASSISTANCE If you have any problem with this unit first check the appropriate section of this m...

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