6 Snap-On FERRITE CORE block EMI / RFI Noise (5/16" ID)

I've used ferrite cores to eliminate EMI / RFI problems in the HF, VHF and UHF spectrum. Examples: Severe noise on shortwave radios, false triggering of "touch" light switches and false tripping home alarm systems. These things really work! One of these cores even eliminated the TV interference from my corded electric shaver with a brush type DC motor.

INSTALLATION:
Installation is very simple. Just snap and lock over any coax, audio, AC or DC power cable up to 5/16" diameter. Smaller cables can be looped with multiple turns for exponential gains in EMI / RFI attenuation. Use a small tie-wrap to secure the device to any nearby anchor.

Works at either end of the noise path through the wiring.

At the SOURCE, ferrite cores attenuate EMI / RFI from transmitters or electrical noise from equipment (computers, motors, fluorescent lights) before it gets into the house wiring through the power cord. Once the noise makes it to the house wiring, it can travel through the wiring directly to your radio, TV, computer etc. BUT the wiring can also act as an antenna and 'broadcast' interference to nearby battery operated equipment too.

At the RECEIVER, ferrite cores attenuate electrical noise generated by all kinds of AC powered equipment traveling through the house wiring before it gets to your radio, TV, computer, etc. BUT, again, the wiring can act as an antenna and pickup RF interference from nearby sources such as mobile radios. So, placement close to the receiver, TV, etc., may be best in that situation.

Bi-Directional Protection: Amazingly, ferrite cores can provide bi-directional protection too. 'Touch lamps' are a good example. They are strong RFI generators when ON while at the same time, they are susceptible to being turned off or on by strong RF fields. Ferrite cores installed close to the lamp can fix the problems in both directions.

Attenuates EMI / RFI or electrical noise picked up by long microphone/audio cables. Multiple units spaced along long lines, can alter the resonant frequency of the cables as well as more evenly distribute the attenuation for better performance.

Generally, placement should be as close to the equipment as possible for maximum attenuation, but as experienced RF technicians know, sometimes, a better location can be determined experimentally.

Preventive Maintenance Great for field operations when working in unfamiliar outdoor environments and you need to reduce the risk of a nearby mobile CB or HAM transmitter getting into your PA, Music sound system or Video equipment.

Here's some common and a few not so common applications: HAM Antenna Coax - Decouple that feed line to stop it from acting as a radial. Mobile transceivers - on DC power cables to reduce ignition interference. Filter radio signals out of your telephone lines. Keep noisy Fuel Pump interference out of your expensive car electronics. Reduce RF interference to your TV, VCR and DVD player. Eliminate false alarms to your burglar alarm caused by RF. Block RFI emissions from electronic equipment such as Digital Scales. Suppress RFI emissions from electronically controlled variable speed DC motors. Stop those SPOOKY 'touch lamps' from switching on/off unexpectedly.

Other core sizes available for 1/4", 3/8" and 1/2" cables.

FC.31-6

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