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Re: I X-Rayed my Apple IIe

aiiadict@gmail.com wrote:

Michael J. Mahon wrote:


copper, but 80kV is not a weekend project.





how about a NeonSign Transformer?


They are typically in the 8kV to 15kV range, at 10mA or so.

Using a diode-capacitor voltage multiplier would require
6x or so to get near 8okV and the available current would
be less than 1mA.

Ideally, the supply would be regulated, and I'd think that
a high-frequency switcher would be the best approach.  The
HV diode string would be an issue.  Using a multiplier chain
approach would be possible, but they get pretty inefficient
beyond 2x-3x, and at these power levels, efficiency is important.

Using the horizontal output section of a *large* CRT TV would
be an interesting place to start, but multiplication would
still be needed, and the available power is only 10W-20W.

High voltage at medium power levels (like 500W) is still
an "interesting" implementation.

Grant, I deduce that the exposures were about 2 minutes--
is that right?  If so, it would be hard to reduce the power
level by increasing exposure time, because of CCD noise.

BTW, is this a direct line-scan CCD image, or is it a full-
area image?  (I assume no "lenses" are involved.)

-michael

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