On 24 Jun, 08:00, m kinsler wrote:

One question that comes to mind is why you don't just use a real
oscilloscope.

Mostly because the screens are quite small.

While I'm here I think you can rule out a converted tv tube on safety
grounds. With such basic scopes there is nothing to stop deflection
going off screen and heating a point of glass tll it softens and goes
bang.

FWIW correct waveform was obtained by using current drive, but
bandwidth is still lmiited. They were just crude tools for tinkerers
that couldnt possibly afford a real scope.


NT