January 1964 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.
comics appeared in a 1964 issue of Radio−Electronics magazine.
Servicing entertainment electronic systems was a big thing in the day, as
evidenced by many of the comics posted here over the past few years (see huge
list at bottom of page). The comic on page 50 shows an oscilloscope display that
was not probable before digital test equipment came to be. It was possible to
generate such a waveform on a cathode ray tube (CRT) face as a reference image,
but it would require very sophisticated circuitry. There were special
applications - like air traffic control plan position indicators (PPI's) - where
pains were taken to be able to add annotation to the display (e.g., aircraft IFF
data). A common method for superimposing fixed references (such as the music
scale here) was to add a composite video signal that was added in with the
sampled signal. It is the opposite of devising a scheme to add o-scope type
video to a standard raster scan TV picture. The page 82 comic is interesting
because it depicts a Ham cogitating on how he can use his kid's metal snow
coaster as an antenna reflector for what would have been upper microwave
Suggested by Herbert E. Pasch
"Man, this amplifier sure attenuates the highs!"
Posted January 30, 2023