Cathode Ray Tubes

This is the grandfather of all CRTs. It is a laboratory model for demonstration purposes. It has no filament and only one pair of deflection plates.

Cathode Ray Tubes can be divided into three main groups:
1. Tubes with electrostatic deflection for use as indicators or in oscilloscopes. This kind of deflection is used to cover a wide frequency range on both X- and Y-axis. The deflection angle must be low in order to keep linearity within useful range.
2. Tubes with magnetic deflection for use in TV-sets, data monitors, radar displays, projection tubes and flying spot scanners. Here the frequency is relatively constant and the deflection angle can be much larger.
3. Tubes that uses a combination of both, so called polar coordinate displays. They were mainly used for radar displays.
The history and the functions of the CRT is well documented in Peter A. Keller's book "The Cathode-Ray Tube" which I strongly recommend for those who want to know almost everything about CRTs. Many thanks to Peter for allowing me to use some of the pictures in the book. Below you will find some unusual CRTs described:
Coketron
coketron.jpg (13141 byte)
An amusing CRT
Charactron
EMI 9788

Graphecon
RCA 7539


Thomson CSF TMA406H

 
Iatron

.
Monoscope
RCA 2F21
2f21.jpg (27632 byte)
Radechon
RCA 6499

Skiatron
4AP10
4ap10.jpg (17748 byte)
Fiber-optic CRT
Tektronix T4601
t4601.jpg (23212 byte)

 Fiber-optic film recording CRT
Other CRTs with
magnetic deflection
Other CRTs with
static deflection