From: - René -
Subject: Re: car stereo killer
Date: Fri, 22 Nov 2002 10:21:35 +0100
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On Thu, 21 Nov 2002 16:44:37 GMT, Wafer
>Thanks for the ummm... "great" story. It had not occurred to me that
>this might have been what happened to me once as well. I was building a
>preamp/EQ for my (oddly enough) Harman-Kardon amp, when suddenly I
>smelled something burning. Now the audio level was way down. I mean like
>below "room volume", and I didn't hear any loud spikes. I found my
>tweeter smoking, but the woofer was ok. It has always bugged me, but
>perhaps this answers it, although I do not recall if any vehicles were
>nearby. I can say though, that there was an occasion or two when the
>electric organ would pick up someone talking, just as a car was going by.
Sounds like plain vanilla amp oscillation. Seen this happen with
several early Yamaha Hifi amplifiers, without the help of any RF.
Boiled the tweeters very convincingly (threads of plastic cone
dripping down), while sound seemed normal up until destruction of
tweeters. A weak hum indicated that the amp was running full power
while volume was set low.
I guess it is possible to hit an amp with RF causing a cascade
destruction of peripheral stuff, but destroying speaker