Mobile Station RFI Kits

MAXI-CHOKER Coax Line Isolator, 1-61 MHz, 3KW, SO-239 In/Out, 5K Choking

MC-1-3000

MAXI-CHOKER Coax Line Isolator, 1-61 MHz, 3KW, SO-239 In/Out, 5K Choking MC-1-3000

MAXI-CHOKER Features:

- Uses proprietary Multi-Mix(TM) technology for maximum choking (up to 6K ohm) and maximum bandwidth

- 3 KW PEP, 50 ohm SO-239 connectors In/Out, 1-61 MHz

- Available with ground stud/static bleeder option for solving tough RFI issues

- Available with dual stud/wingnut output for ladder line interface

- Works for all coax fed antennas from 1.8-61 MHz (160-6 meters) - excellent for multi-band beams, verticals, dipoles and off center fed antennas.

- 2-5 times more choking resistance, wider bandwidth and higher power then competing filters


MAXI-CHOKER feed line chokes are used to suppress common mode current carried on the outside of the coax braid which is often responsible for receiver noise and RFI in the receiver/transmitter. These chokes are very useful for suppressing RFI common mode current at the antenna feed point, at 1/2 wavelength intervals along the coax feed line and also at the entrance to the radio station.

This choke is available with a SO-239 input/output and ground/static bleeder stud (optional) for attachment to a ground rod. Use an isolator every 1/2 wavelength for the antenna operating frequency (include velocity factor in calculation). Use the ground lug option for long coax antenna feed lines (over 1/2 wavelength at the operating frequency of any antenna system in the near field of the coax).






$79.95 In stock
Brand:Palomar Engineers
MPN:MC-1-3000
Country/Region of Manufacture:United States
Effective Frequency Range (MHz):1-161
PEP Power Rating (watts):3000 to 61 MHz, 500 watts to 161 Mhz
Choking Impedance Range (ohms):500-6000 (1-61 Mhz)
Common Mode Attenuation (db):20-35db
Estimated Insertion Loss (db):.25 db
Input Connector Type:SO-239 female
Output Connector Connector Type:SO-239 female
Ground Connector (Y/N):optional
Enclosure Size (LxWxH inches):12" long, 2 in diameter
Ground Stud/Static Bleeder Option
MAXI-CHOKER Coax Line Isolator, 1-61 MHz, 3KW, SO-239 In/Out, 5K ChokingMAXI-CHOKER Coax Line Isolator, 1-61 MHz, 3KW, SO-239 In/Out, 5K Choking
Mobile RFI kits work two ways: They suppress RFI from on board computers and other sensing/control devices in your vehicle that may cause your radio to be a VICTIM of RFI, and second they suppress RFI generated by your radio as a SOURCE which may affect your on board computers or other devices.  Mobile operations of HF radios (1-30 Mhz) tend to experience more RFI effects than VHF/UHF mobile stations.  If you have both HF and VHF installations in your vehicles, you may need both kits.

To address separate solutions we have developed two separate RFI kits: one for HF (1.8-300 MHz) mobile installations and another for VHF/UHF (30-1000 MHz) mobile installations.  Each kit uses the appropriate ferrite mix for the frequency range desired.