Did the U.S. Military Use CRTs for Radar in the 1950s Instead of LCDs?

In the 1950s, the U.S. Navy, including the author who served from 1957-1961, did rely heavily on Cathode Ray Tubes (CRTs) for their radar systems, as these technologies were the cutting edge of the were no Liquid Crystal Displays (LCDs) used in military applications during that era, which marks a stark contrast with the technological advancements that have occurred since.

Historical Context of Radar Technology in the 1950s

When the author served in the U.S. Navy during the early 1960s, the use of CRTs was pervasive. Radar technology, which relies on emitting radio waves and measuring the reflected signal to determine the range and direction of objects, was an essential part of maritime navigation and defense. The author noted that repairing these radar systems often involved diagnosing and fixing discrete components such as resistors, capacitors, and even vacuum tubes. The lack of Integrated Circuits (ICs) at that time meant that the problems were frequently traced back to the most fundamental components of the system.

Use of CRTs in Radar Systems

Cathode Ray Tubes (CRTs) were the standard display technology during this period. They were the heart of radar systems, providing the visual outputs necessary for identifying and tracking targets. The CRTs were large and bulky, which limited their portability and required significant maintenance. However, they were reliable and the only available display technology at the time.

Technological Advancements and the Transition to LCDs

By the time the author served in the Navy, the tape recorder was the most modern convenience. This reel-to-reel device, about the size of a medium suitcase, was used primarily for recording sonar contacts. The author also used it to record radio stations while in port to enjoy music during sea voyages. However, this device was a considerable change from the CRTs that were the backbone of radar technology.

The transition from CRTs to Liquid Crystal Displays (LCDs) was gradual and significant. LCDs were not invented until a few years later, in the late 1960s and early 1970s. Once they became available, they quickly replaced CRTs due to their smaller size, higher energy efficiency, and better reliability for display technologies in various applications.

The Impact of LCDs on Radar Technology

Radar displays today use Liquid Crystal Displays (LCDs) almost exclusively. LCD technology has revolutionized the way radar systems work. LCD displays are much more compact and lighter, making them ideal for modern naval and aeronautical applications where portability and energy efficiency are crucial.

Conclusion

The author's experience in the 1950s provided a clear insight into how different the technology landscape was compared to today. While CRTs were the dominant technology in radar systems then, LCDs have since become the standard due to their numerous advantages. The transition from CRTs to LCDs in radar technology is a prime example of how rapidly technology evolves and affects military and civilian applications alike.

The story of CRTs and LCDs in radar technology serves as a reminder of the constant evolution of technology, highlighting the importance of continual development and innovation in military and civilian sectors.