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K-Y FILTER COMPANY
3010 Grinnel Place
Davis, CA 95616
e-mail: ki6ky@comcast.net
telephone: (530) 757-6873


RFI Filter

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


These Model RF1 nickel-zinc ferrite choke, plug-in, modem/telephone RF filters are convenient, inexpensive and extremely effective on all dial-up modems and single line 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 an RJ11 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.




We now manufacture two different filters.


Model RF-1 (price=$24.95 US Dollars) eradicates HF (short wave 1 to 30 MHz) interference and it works with DSL modems as well as dial-up modems.
Model AM-1 ($27.95 US Dollars) is for AM Broadcast band or Medium Wave interference but it will not work with DSL because it filters out the DSL data signal itself.

To stop AM broadcast interference to a DSL system, the RF-1 can be used. It does not attenuate AM as well as the AM-1 but it will solve the problem without affecting the DSL data, in many cases.

Both filters use RJ11 connectors.
CLICK HERE TO ORDER
(We ship Air Mail for international orders at no charge.)
Absolute unconditional money back guarantee if not satisfied!




CLICK HERE for Radio Interference troubleshooting.


Click here for Television TVI Filters!

Click here for 2-line filters!

CLICK HERE FOR K-Y FILTER TESTIMONIALS!!



Click here for choke specifications.
  • CLICK HERE FOR AC LINE RFI FILTERS!
  • CLICK HERE FOR MORE RFI INFO!
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    CLICK HERE FOR OUR PRIVACY STATEMENT



    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 !




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    Click here for your very own domain name at a very low price.








    Web Author: KI6KY
    Copyright ©2006, by John K. Browne - ALL RIGHTS RESERVED