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From: Kevin McMurtrie
Subject: Re: Tesla coil question
References: <3DE816FC.F00A605B@NAESPAM.yahoo.com> <3DE8555D.6A97D8D1@NAESPAM.yahoo.com>
User-Agent: MT-NewsWatcher/3.2 (PPC Mac OS X)
Date: Sat, 30 Nov 2002 07:42:42 GMT
NNTP-Posting-Date: Fri, 29 Nov 2002 23:42:42 PST
In article <3DE8555D.6A97D8D1@NAESPAM.yahoo.com>,
>Kevin McMurtrie wrote:
>> In article <3DE816FC.F00A605B@NAESPAM.yahoo.com>,
>> tom wrote:
>> >I was reading
>> >and a few thoughts crossed my mind.
>> >the Tesla coil it appears works a bit like a radio. To get a changing
>> >field in the
>> >primary simple breakdown seems to be used ie a spark gap and this
>> >power in the secondary. I take it that the frequency of the secondary
>> >just depends
>> >on the LC of the secondary ie what the centre frequency is? Also the
>> >must be quite broadband for their being enough power to be picked up in
>> >first place but it is a spark transmitter so I suppose that explains it.
>> >Does anybody use an oscillator in the primary instead of a spark ie a
>> >frequency oscillator a bit like use in an invertor but variable
>> People try but it's very hard. A _LOT_ of power needs to be pumped into
>> a primary coil that's a short loop of copper pipe. The frequency needs
>> to be just right and you need plenty of shielding on the inverter. I
>> tried once and blew a handful of MOSFETs without making more than a few
>> KV on the secondary.
>> The nice thing about a spark is that it delivers a lot of power then
>> breaks the coupling to the power supply.
>> >Also how high in frequency can you go with this idea? Can you do
>> >similar with light? ( I suppose a laser is the nearest). What about a
>> >Tesla coil?
>> You can make mini telsa coils but their voltage is greatly limited by
>> arcing. High grade xenon trigger transformers can operate like mini
>> tesla coils until ozone damages their insulation. They operate at a few
>> MHz with the core fully screwed in.
>> If you want high voltage microwaves, a microwave oven has the parts. It
>> will destroy all nearby electronics, set the house on fire, and any
>> signal reflection could kill you. (Vital organs fail with just a little
>Seems strange the US or someone has not developed a weapon based
I saw a clip on TV where the US military was trying to stall cars with
microwaves. It worked but the hood had to be up! I've also heard that
the old coiled Macintosh ADB cables would fry the computer when hit by
Microwaves would make a messy weapon.
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