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Article #694High pitched squeal in Ford electronic radios
From: Bill Landsborough
Date: Wed, 12 Feb 1986 23:07
Date: Wed, 12 Feb 1986 23:07
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After taking my 1985 Ford F-150 pickup in for a high pitched squeal
coming from their top of the line radio for the fifth time they
finally were able to eliminate the problem by special modifications to
the internal circuit of the radio. The squeal was constant as long as
the radio power switch was on. Tape or radio, AM or FM, engine
running or not, it would squeal. It was a very high frequency just at
the point of human ability to hear it. But it drove us crazy once we
realized that it was there.
The cause was the green phosphorus display was emmitting the noise and
it was being amplified through the audio circuit to the speakers.
If you have this problem and never found out what the cause was, this
might be it.
Bill Landsborough
----
"Love is patient and kind; love is not jealous or boastful; it is not
arrogant or rude... Love bears all things, believes all things, hopes all
things, endures all things." 1 Corinthians 13:4-7
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2.fluke 9/24/84; site vax4.fluke.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!gamma!epsilon!zeta!sabre!petrus!bellcore!decvax!tektronix!uw-beaver!fluke!marauder From: marauder@fluke.UUCP (Bill Landsborough) Newsgroups: net.auto.tech Subject: High pitched squeal in Ford electronic radios Message-ID: <3090@vax4.fluke.UUCP> Date: Wed, 12-Feb-86 18:07:16 EST Article-I.D.: vax4.3090 Posted: Wed Feb 12 18:07:16 1986 Date-Received: Sat, 15-Feb-86 04:37:23 EST Distribution: net Organization: John Fluke Mfg. Co., Inc., Everett, WA Lines: 22