The simplest, most cost effective feed line choke is a ferrite ring installed as shown in the picture (at the antenna feed point) to stop feed line radiation or at the radio end of the coax to suppress common mode coax noise current on the coax braid.

Great choke for log periodics, HF beams, Transceiver/Amp isolation

Improves antenna pattern by preventing your dipole from becoming a tripole

Suppresses pesky coax braid radiation and RFI

Reduces coax braid common mode current up to -40 dB ( 6 “S” units) on receive

Use one choke for each antenna feed line

Add a double female barrel connector to act as an “extension” of the existing coax.

Marine/RV RFI Solutions

Store/RFI Solution Kits/Marine/RV RFI Solutions

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AC Cable Noise Filter for Large Plugs - 3" ID for Generator, Dryer

SKU ACCF-3

$39.95

AC Cable Noise Filter for Standard 120VAC Plugs - 1.4" ID

SKU ACCF-1.4

$12.95

Boat/RV Owner’s Electronic Interference Suppression Kit

SKU RFI-Boat

$95.00

DC Cable Noise Filter for 2 Gauge and Smaller Wire - 1.4" ID

SKU DCCF-1.4

$12.95

DC Cable Noise Filter for Large Gauge Wire - 3" ID

SKU DCCF-3

$39.95

On Sale

DC Voltage Common Mode Noise Filter - Marine, RV, Communications, Off Grid Power, 600 Volts/30 Amps

SKU RFI-DC-30

List price ~~$129.95~~

Save 23%

$99.95

FT400-3I, ID=3", RFI Range 1-300 MHz

SKU F400-31-1

$39.95

Fish Finder-Sonar-Depth Finder RFI Kit

SKU RFI-FF

$44.95

Generic Marine HF Radio RFI and Noise Reduction Kit, RFI Range 1-60 MHz - Icom, Furuno, SGC

SKU RFI-HF-MARINE

$89.95

On Sale

RV/Trailer Multi-Ring/Multi-Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 17 filters

SKU RVCP-31-17

List price ~~$112.00~~

Save 15%

$95.00

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