Article View: sci.electronics
Article #8540Curing Grappler Box RFI
From: John Boteler
Date: Sun, 25 Nov 1990 06:47
Date: Sun, 25 Nov 1990 06:47
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1469 bytes
Has anyone had any success in reducing the incredibly
high amount of RF radiated from their Grappler box?
My housemate has one hooked to a Mac and the thing makes most
of the frequencies in my scanner and ham equipment useless,
throwing birdies out all over the place.
I tore it apart with the intent of hanging capacitors
everywhere, but they actually bothered to do some
filtering at the factory. I added a 0.047uF across
the output terminals of the 7805 voltage regulator
for good measure, but the source of the interference
is the execution of the on-board Z8's program.
Please email responses since my feed and my news partition
don't feel well. The clock starts ticking now; if
there is no cure, I'm tempted to Grapple the thing
into the ocean!
--
John Boteler bote@csense {uunet | ka3ovk}!media!csense!bote
SkinnyDipper's Hotline: 703 241 BARE | VOICE only, Touch-Tone(TM) signalling
Technical Details
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<1990Nov25.064753.186@csense.uucp>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!mit-eddie!bloom-beacon!snorkelwacker.mit.edu!apple!julius.cs.uiuc.edu!usc!cs.utexas.edu!wuarchive!udel!haven!mimsy!prometheus!media!csense!boteShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!mit-eddie!bloom-beacon!snorkelwacker.mit.edu!apple!julius.cs.uiuc.edu!usc!cs.utexas.edu!wuarchive!udel!haven!mimsy!prometheus!media!csense!bote From: bote@csense.uucp (John Boteler) Newsgroups: sci.electronics,rec.ham-radio Subject: Curing Grappler Box RFI Keywords: RFI grappler macintosh Message-ID: <1990Nov25.064753.186@csense.uucp> Date: 25 Nov 90 06:47:53 GMT Followup-To: poster Distribution: usa Organization: Common Sense Computing, McLean, VA. Lines: 23