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


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


These Model RF1 nickel-zinc ferrite choke, plug-in, modem RF filters are convenient, inexpensive and extremely effective on all 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.
We now manufacture two different filters. Model RF-1 is for HF (short wave) interference and the AM-1 is for AM Broadcast band interference. Please specify which one you need when you order.

Click here for 2-line filters!

Absolute unconditional money back guarantee if not satisfied!

  • Click here for choke specifications.
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    Absolute unconditional money back guarantee if not satisfied!



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