Subject: Re: car stereo killer
Organization: Gyro Gearloose Productions
X-Newsreader: Gyro's Spewer 0/32.572
Date: Wed, 20 Nov 2002 13:04:04 GMT
NNTP-Posting-Date: Wed, 20 Nov 2002 08:04:04 EST
On Sat, 26 Oct 2002 06:11:49 GMT, hypnodom
>anyone know of or about a device that when activated will destory a car
>stereo system ? i know they have it and crutchfield offered it at one
>time ,, any help
Nothing but a bunch of smart-ass answer, so far ...
so, I'll hope to tell you. In short, yes: a device can be
constructed, which will take out a stereo system, whether it is on
or off! But it's effectiveness might be limited against autos,
because of all that metal around the wiring. You have to get into
the speaker wiring with a few hundred watts ERP of RF, at a short
enough wavelength to transfer maximum power (FM'ing [sweeping] it
would be nice).
Let me tell you what happened about 5 years ago, purely accidentally.
There was a Hamfest in town, well, in the next town, but the
mobiles were out and about that day. I was listening to Blackhawk on
the #2 system (Harman-Kardon turntable, Sony CD player, AAL studio
monitors, Technics amp - IOW, a fairly robust system).
Well, some clown keyed down right in front of my house, en passant.
I have never seen such destruction from an RF hit before. The
speakers were literally smoking, and the amp broke into HORRENDOUS
oscillation (but it didn't blow up!). It also took out my preamp, as
well as the cartridge on my Sanyo Turntable in the next room, which
I used to make mp3's from vinyl. It didn't harm the computer or sound
card (due to good shielding and a frank ground return), but it fried
the preamp and burnt out the cartridge in my turntable. The turntable
in the other room was not damaged, nor was the amp. But the speakers
were toast! Both midranges and tweeters were literally smoking, just
before they popped. I had to replace the woofers, too, (and re-tune
the ports, due to different parameters of the replacement drivers,
but that's another issue).
Now, the speaker cables are about 20 feet long, but only about 13
feet in any one halfway straight path, so a quarter wave is between
15 and 24 meters. I'd venture to surmise that some asshole on 20
meters, with his beefed-up Atlas SSB rig, did radiate illegal power
levels, and cause a bad accident.
I said all that, to say this:
Basically, if you hit the wiring with the right frequency, and with
enough power, you can take out some speakers .... guaranteed.
I'm not going to tell you _how_ to do it ... design and [construction
of the destruction] unit is left to the reader to research.
But, yeah, it can easily be done. You'll probably fry everything
else in the car, too, though (EFI system, etc...), so I would give
it some serious though, first. We are talking about doing some
_awesome_ potential damage, here.
+ All email to janitor goes to my bit-bin
+ remove the string: .DEV_NUL. in the reply-to, to email me.
+ I am fed up with spam.
I don't know of anybody that has a perfect life
- Marie Osmond