Article View: sci.electronics
Article #882Re: Electronic Pest Control
From: David Chapman
Date: Wed, 19 Jul 1989 03:03
Date: Wed, 19 Jul 1989 03:03
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1046 bytes
In article <12726@well.UUCP> fgk@well.UUCP (Frank G Kienast) writes:
>> [stuff deleted]
>> verbage) produced a 14KHZ sound wave. This just so happens to be the
>> mating frequency of la cucharacha..the despised cockroach.
>
>Then wouldn't cockroaches also be attracted to TV sets? TV sets produce
>sound at 14.7KHZ.
>
U.S. TV sets scan at 15.75 kHz, not at 14.7. The flyback transformer tends
to whine at that frequency (drives me nuts if it's too loud).
--
David Chapman
{known world}!decwrl!vlsisj!fndry!davidc
vlsisj!fndry!davidc@decwrl.dec.com
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<15271@vlsisj.VLSI.COM>Path:
arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!purdue!decwrl!pyramid!leadsv!practic!vlsisj!davidcReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!purdue!decwrl!pyramid!leadsv!practic!vlsisj!davidc From: davidc@vlsisj.VLSI.COM (David Chapman) Newsgroups: sci.electronics Subject: Re: Electronic Pest Control Summary: 15.75 kHz Message-ID: <15271@vlsisj.VLSI.COM> Date: 19 Jul 89 03:03:19 GMT References: <12726@well.UUCP> Reply-To: davidc@vlsisj.UUCP (David Chapman) Distribution: sci Organization: VLSI Technology Inc., San Jose, CA Lines: 15