[rescue] Vector Plotters

Richard legalize at xmission.com
Tue Oct 6 11:35:21 CDT 2015

In article <5612D192.8040104 at neurotica.com>,
    Dave McGuire <mcguire at neurotica.com> writes:

> [...] it's
> trivial to move an electron beam VERY VERY QUICKLY.  Look at super-fast
> analog oscilloscopes like the Tektronix 7104.

I wouldn't call it trivial to move it very, very quickly.  It is
trivial to move an electron.  Moving it very, very quickly is

Tektronix has spent many decades incrementally improving the circuitry
for deflecting the electron beam.  The 7104 dates from 1978 by which
time Tektronix had already spent a couple decades improving their
deflection beam technology.  It isn't the mass of the electrons that
matters in the circuitry of deflecting the beam; it's the electrical
response time of the magnetic/electrostatic mechanism in response to
changes in the input signal.
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