Common Mode Noise Filter - AC or DC Power

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25-AMP (Peak) IN-LINE ELECTRONIC FILTER for 12 VOLTS DC, AUTOMOTIVE, RV RFI, ALTERNATOR, PULSE NOISE SUPPRESSION

SKU RFI-N700

$49.95

30-AMP (PEAK) IN-LINE TOROIDAL DC NOISE FILTER for 12 VOLTS, ALTERNATOR, PULSE NOISE SUPPRESSION

SKU RFI-N25

$34.95

AC Power Cord Choke + Power Cord- 120VAC RFI Range: 1-30 MHz, -28 dB Noise Reduction, 15 Amp

SKU AC-CHOKE-6

$19.95

AC/DC Generator RFI Noise Filter Kit - 3" ID - 2 filters

SKU RFI-GEN-3

$74.95

AC/DC Generator RFI Noise Filter Kit = 1" ID - 2 filters

SKU RFI-GEN-1

$39.00

Big Clamp On RFI Noise Filter for AC/DC power lines, Coax/Multi-wire cable - 1" ID

SKU BCO31

$19.95

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

DC-AC Inverter Common Mode RFI/Noise Filter Kit for DC in and AC Output

SKU RFI-INVERTER

$34.95

F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31

SKU F240-31-1

$9.99

On Sale

FSB31-1, ID=1", RFI Range 1-300 MHz, Bulk Pack of 10

SKU FSB31-1-10

List price ~~$195.00~~

Save 13%

$169.50

On Sale

FSB31-1, ID=1", RFI Range 1-300 MHz, Bulk Pack of 3

SKU FSB31-1-3

List price ~~$58.50~~

Save 15%

$49.95

FSB31-1, ID=1", RFI Range 1-300 MHz, Case of 36 Pieces, FREE USA SHIPPING

SKU FSB31-1-36

$550.00

FSB31-1-1, ID=1", RFI Range 1-300 MHz

SKU FSB31-1-1

$19.95

On Sale

FSB31-1.5, ID=1.465", RFI Range 1-300 MHz

SKU FSB31-1.5-1

List price ~~$69.50~~

Save 28%

$49.95

On Sale

FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Bulk Pack of 10

SKU F240-31-10

List price ~~$100.00~~

Save 10%

$89.95

On Sale

FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Case of 100

SKU F240-31-100

List price ~~$1,000.00~~

Save 21%

$795.00

On Sale

FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Mini Pack of 3

SKU F240-31-3

List price ~~$34.95~~

Save 14%

$29.95

Power Pole DC Power Cord RFI/Noise Filter - up to 30dB Noise Reduction, 45 Amp Connectors

SKU PPNF-3

$34.95

RFI Common Mode Noise Filter Kits for FLEX RADIO Antenna Genius Antenna Switches - Isolate Non-Selected Coax Braid Noise!

Suppress Unwanted Noise & RFI

SKU RFI-AS-FLEX-2

$179.95

Solar RFI/Noise Filter - 1.5" ID

SKU SNF-1.5

$49.50

Switch Mode Power Supply (SMPS) Common Mode RFI/Noise Reduction Filter Kit

SKU RFI-SMPS

$27.95

Wall Wart RFI Noise Filter Bulk Pack of 10 Filters

SKU RFI-WW-10

$29.95

Wall Wart RFI Noise Filter Bulk Pack of 100 filters

SKU RFI-WW-100

$199.95

Wall Wart RFI Noise Filter Pack (5 filters)

SKU RFI-WW-5

$16.95

Also make sure you connect a good RF ground to the transceiver ground post.

Note to Flex Radio users: Use snap on ferrites for firewire cable, speaker cable and mic cable, Ring ferrites for Antenna output and DC power.

For additional RFI suppression, use a feed line choke at the antenna to suppress common current on the coax feed line – see our store for feed line choke alternatives for use at the antenna.

If you use a linear amplifier we have RFI kits for linear amplifiers that help suppress RFI in your shack or in your neighbor’s house.