|
July 1961 Radio-Electronics
 [Table of Contents]
Wax nostalgic about and learn from the history of early electronics.
See articles from Radio-Electronics,
published 1930-1988. All copyrights hereby acknowledged.
|
Making and using LCD displays
is child's play compared to what was required to design, manufacture, and implement
cathode ray tubes for televisions, test equipment, security and industrial monitors,
and in the end days for CRTs, computer monitors. That is not to say the evolution
of LCD displays was an easy endeavor, just that now novice hobbyists can easily
design an LCD display into a project. Such was not the case with CRTs, even after
the tube itself was made available. Designing deflection coils and the driver circuitry
required, even if the person is not aware of it, to account for relativistic effects
due to the speed and mass of electrons in the beta ray stream used to cause the
fluorescent dots on the face of the tube to glow. The electrons experience a relativistic
mass increase which requires the beam deflection coils to generate greater force
than if the electrons were moving more slowly. This promotion for RCA's efforts
to develop a more perfect CRT appeared in a 1961 issue of Radio-Electronics
magazine.
RCA Electron Gun
 A Space-Age Bath for Electron Guns
Another RCA Precaution Against Picture Tube Callbacks
Superior TV picture tube quality depends largely on an electron gun that is precision-made
and clinically clean. RCA assures the cleanest guns possible in Silverama Picture
Tubes by employing the costly space-age technique of ultrasonic cleaning: scrubbing
gun mounts with high-frequency vibrations in a super-wet detergent to remove even
microscopic foreign particles.
In this and every respect, RCA Silverama Picture Tubes are built to the highest
standards of the picture tube industry. They contain an all-new electron gun, all-new
parts and materials except for the envelope which is used.
These extra precautions help substantially to reduce troublesome "in-warranty
failures" and costly callbacks. So give yourself the advantage of selling the best
name brand picture tube: RCA Silverama. It's now merchandised in an attractive,
distinctive new package and is competitively priced with other leading brands of
picture tubes. See your Authorized RCA Distributor this week.
Guns emerging from ultrasonic cleaning tank. Still in the same tray, they are
placed immediately in the radiant drying oven shown in the photograph at right.
Gun mounts are dried for one hour at 150°C (302°F.). Then, super-dry
and super-clean, they are taken out for final processing in our dust-free "White
Room".
RCA Electron Tube Division, Harrison, N. J.
The Most Trusted Name in Electronics RCA®
Radio Corporation of America
Posted September 10, 2024
|
