[TCML] RE: Practical application for HV

[vatercox@xxxxxxx]

Well, apart from the YouTube presentation shown  there are actually 
many instances where it is necessary to remove all data from a disk  
i.e to destroy it completely for say, security reasons. Well you could 
of course shred the disk with a purpose-designed document shredder - 
but here I am supposing you want to keep the disk. Notwithstandind that 
in the presention the "silvering" is shown being  "burnt off" or 
"evaporated"  from the disk witha pole transformer  I seem no reason 
why this could not be done with a commercially-designed "eraser" say, 
using a flyback transformer and SMPS -much smaller and lighter and more 
practical. The use of HV to erode metal films is in no way new- for 
instance  In the 80's in Britain Sinclair marketed an electrospark 
printer (using an aluminised paper roll) to go with the ZX81 and ZX 
Spectrum computers

JF Cox
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