Re: I X-Rayed my Apple IIe

["Grant Stockly" <grant@stockly.com>]

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

70-80kv at .3ma will do a decent job too.

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

or 4.2kw  : )

> 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.

The exposure of each line was 30ms.  I was only operating the tube at
1/4 power.  If I cranked it up to 80kv 20ma I could have done the shot
much faster.

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

Its a line.

If you ever tried something like this your best bet is to submerge the
tube, transformer, and doublers in oil and seal/vacuum all the air from
the bundle.  Otherwise you're going to have arcing all over the place.

There are places that will sell you just a tube.  A little tiny one the
size of a D cell battery that work pretty good.  (30-40w)