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From: kyle.wbst@XEROX.COM
Newsgroups: mod.telecom
Subject: Hum Suppression Wanted
Message-ID: <8610050731.AA01362@ucbvax>
Date: Wed, 1-Oct-86 22:56:40 EDT
Article-I.D.: ucbvax.8610050731.AA01362
Posted: Wed Oct  1 22:56:40 1986
Date-Received: Sun, 5-Oct-86 06:38:23 EDT
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Approved: telecom@xx.lcs.mit.edu

A friend has a new gift of a "Ring-On" Model TL-6630 AM/FM Clock
Radio/Telephone with built-in speaker phone feature that has a fairly
loud humming noise when using it as an ordinary phone. The sound is
similar to the noise I often hear in jumbo jets when listening to music
on the headphones (that's a 400 Hz tone, I think).

Any suggestions to solving this problem?

Thanks,

Earle.