Name: AC/DC Generator RFI Noise Filter Kit = 1" ID - 2 filters
Brand: Palomar Engineers
SKU: RFI-GEN-1
Price: 39.0 USD
Availability: InStock

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

Store/RFI Solution Kits/Radio Communication RFI Solutions/Common Mode Noise Filter - AC or DC Power

Product Details

MPN: RFI-GEN-1

Type: New

Country/Region of Manufacture: United States

Filter Power Rating (PEP watts): power rating of cable

RFI Suppression Range (MHz): 1-300 MHz

The RFI generator kit includes 2 snap on filters with 1 inch inside diameter for 1-2 turns of AC generator cable at generator and another 1-2 turns through center at the end of the generator cable near the powered device. The filter near the generator isolates generator power cable and prevents it from acting as an RFI antenna (generator source) and the filter near the powered device prevents the powered device from using the generator cable as an RFI antenna.

Use 2 or more turns through the filter for higher RFI suppression than a single turn (2 turns is 4 times the suppression as 1 turn, 3 turns is 9 times a single turn, etc.)

If you have a generator cable larger than 1/2" diameter, consider the RFI-GEN-3 generator filter with a 3" inside diameter.

Note: generator cable not included.

When considering solutions for AM broadcast (550 Khz – 1.8 Mhz) you should consider Mix 77 ferrites available in a variety of shapes and sizes. Choose a size to give the maximum number of turns of the affected wire or cable.

AM broadcast transmits on a low frequency with large antennas. Consequently it takes a large antenna to receive the signals. Typical “antennas” are AC house wiring, phone lines, long satellite or cable TV cables, DSL/CAT5 lines running between rooms, etc. The device wires that connect to these “antennas” need to be choked with as many turns through the ferrite as possible. Some installation examples are shown below on this page.

For AC/ DC power cords and coax cables the F240-77 (2.4″ OD, 1.4″ ID) “Donut” toroid is the most popular. Also available are smaller toroid donuts and Mix 77 beads. Shown below is a graph with 8, 10, and 12 turns through the toroid – obviously more turns has higher choking impedance. Mix 77 toroid products are HERE and Mix 77 small beads (for small wires) are HERE

F240 77 Turns Comparison 1024x648 - AM Broadcast RFI Kits

F240-77 Turns Comparison from .1 – 8.1 Mhz

Shown below is a graph of frequency response verses choking magnitude for a F240-77 in the AM Broadcast band for a 12 turn coil around the toroid. (Same info as above but different frequency range).