Re: hi freq's and computers

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <teslalist-at-qwest-dot-net>" <davep-at-quik-dot-com>

         This sort of stuff is not 'safe/unsafe'.  Its levels
         of risks.

>You're going to have to explain to me why it matters

>if the PC is functioning.

         Analogy:
         If i have 0.7A thru a 1 A fuse: it does not blow.
         If I add 0.4A: it blows.
         If i have no amps thru a 1A fuse it does not blow,
         I need to _add_ 1.1A to get it to blow...
                 The first case is that of a powered up
                 'puter, the second that of a 'puter off.

         (the parallel is exact, actually, since 'blowing'
         the itty bitty conductors is one failure mech.
         Consider the same analogy in a spark gap sense:
                 If a 1KV gap has 500V on it, I need only
                 add 500V to break it over...
         Again, the analogy is exact, as there are lots of
         Very Thin Insulators in the ICs and etc inside the
         'puter.)

>As I see it, all the cords and cables act as antennas.

         Exactly Right.


>The ICs and other goodies on the "inside" of the computer

>doesn't care if the circuit is powered up or not for the

>HV, RF "stuff" the "antennas" picked up to fry the circuits.
         cf as above.

         Being on 'prestresses' the components, lowering the
         amount of added energy required to do damage.


>...  We theorize that the metal Farady cages that also happen to be the 
>CPU and monitor cases shielded all the "stuff" from the electronics.

         'shields' are always partially effective.
         Some is better than none.  'some' will fail at
         high enough threat level...  Enough will withstand
         almost anything...

         (hint:
         I have done emi/rfi/esd testing for a living....)

         best
         dwp

...the net of a million lies...
         Vernor Vinge
There are Many Web Sites which Say Many Things.
         -me
...for he has read everything, and written nothing...
         A J Raffles