"amdx" wrote in message
...
On 3/5/2014 6:26 PM, Tom Miller wrote:

wrote in message
...
"hanging by their leads which might only be .040" in diameter, "

HAHA.. what a mistake. Really, forty thousandths ? Try more like
fourteen...

LOL

Just a few comments:

1) The original circuit used bipolar NPN transistors in the hybrid. You
might consider using some high voltage video driver transistors for your
design.

That works for me.


2) The circuit is not driving the deflection plates directly. They are
driving a delay line with taps that connect to the deflection plates.

Only going by what I see on the schematic*, but the delay line are back
two stages before the plates.

This is so the deflection signal follows, in time, the electron beam as
it moves through the deflection plate assembly.

My thinking is the delay allows you to see the triggering event,
but it is a wag on my part.



*The OP has intimated that my schematic is not correct, but I want him
to
reinforce that, as of now I'm going with, it is correct.
Mikek



No, the delay line for the deflection plates is inside the tube, parallel to
the segmented plates. Its purpose is to align the instantaneous deflection
voltage with the moving electron beam. Just for the learning experience why
don't you calculate the speed of the beam as it passes from the beginning to
the end of the vertical deflection plates. remember it is in a vacuum i.e.
ideal.

The delay line you speak of is usually a coil of coax and does exactly what
you said. It lets you see the beginning of an event after the trigger.

The schematic is correct.

tm