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K-Y FILTER COMPANY
3010 Grinnel Place
Davis, CA 95618
e-mail: ki6ky@ix.netcom.com
telephone: (530) 757-6873


RFI Filter

Modem/Telephone Super Filters For HF and AM Radio Interference.


These nickel-zinc ferrite choke, plug-in, modem RF filters are convenient, inexpensive and extremely effective on all dial-up modems and telephones. These state of the art two stage telephone filters stop HF radio interference from disconnecting modems and jamming telephones. These filters are guaranteed to attenuate RF better than any other inexpensive plug-in filter on the market. Each filter is terminated with a modular plug and will work on all dial-up modems, including single line (2 wire) telephones. This radio frequency interference filter is extremely simple to install on your modem or telephone. Simply unplug the telephone line, plug in the filter and then plug the phone line into the filter. Now you can use your modem and telephone even in the presence of very strong HF RF fields.


This is a quality range of filters online for telephone interference and more at affordable prices. Modem filters, telephone filters, hf super filters and am super filters online now in California, USA.

Our plug-in filters also remove radio interference from FAX machines.



We now make two different filters. Model RF-1 and Model AM-1.
Model RF-1 has an RJ11 connector and it eradicates HF (short wave 1 to 30 MHz) interference. It works with all dial-up modems. It is colored Grey to differentiate it from the AM-1 filter

Click here for filter Prices!!

Absolute unconditional money back guarantee if not satisfied!

To order filters with free shipping click here




Model AM-1 also uses RJ11 connectors and it is for AM Broadcast band or Medium Wave interference. It's color is Black. (It will not work with DSL because it usually filters out the DSL data signal itself).




Click here for Television TVI Filters!

Click here for 2-line filters!

Absolute unconditional money back guarantee if not satisfied!

To order filters with free shipping click here


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Filter measurements by Jim Brown K9YC
Click on the picture for the Guide to RFI, Ferrites, Baluns, and Audio Interfacing by K9YC!


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CLICK HERE FOR K-Y FILTER TESTIMONIALS!!



  • Click here for choke specifications.
  • CLICK HERE FOR Guide to RFI, Ferrites, Baluns, and Audio Interfacing by K9YC !
  • CLICK HERE FOR AC LINE RFI FILTERS!
  • CLICK HERE FOR MORE RFI INFO!
  • RFI trouble shooting.
  • RF Interference FAQ's
  • MORE RF Interference FAQ's
  • CYBERHAMS, Click here for your own free website!
  • CLICK HERE TO MAKE MONEY WITH YOUR WEBSITE!!
  • Click here to promote your site.

    To order filters with free shipping click here
    Absolute unconditional money back guarantee if not satisfied!




    Bookmark and Share

    Filter measurements by Jim Brown K9YC
    Click on the picture for the Guide to RFI, Ferrites, Baluns, and Audio Interfacing by K9YC!


    Bookmark and Share

    RFI Related Links:

    Click here for the RFI MAILING LIST ARCHIVES!!

    American Radio Relay League RFI
    American Radio Relay League RFI
    American Radio Relay League RFI

    Ground Loop Problems

    More RFI Links!

    Click here for ARRL Technical Info.

    Computer Network RFI

    Pacbell

    KB5ILY's "Home Page" list.




    Click here to visit E.Ham.net



    Click on the above picture to hear California amateur radio!




    Click on the above logo for ham radio software !




    Get you own domain name!

    We here at K-Y Filter Co., have acquired an inexpensive source of domain names. Click here for your very own domain name at a very low price.








    Web Author: KI6KY
    Copyright 2009, by John K. Browne - ALL RIGHTS RESERVED