[Doc Ewen looks into the horn antenna, 1950]
Image courtesy of Doc Ewen

Introduction

Harvard Cyclotron: 1948-1951


Detection of HI Line: 1951

Harvard 24ft and 60ft and NRAO founding: 1952-1956

1950s and 1960s: Two Roads that Crossed

Microwave & Millimeter Wave Applications in the 1970s and 1980s

Mm Wave Radiometry in the 1990s

May 2001 visit to NRAO Green Bank

Bibliography

Permissions


[Doc Ewen and horn antenna, 2001]
Image courtesy of Doc Ewen

Doc Ewen: The Horn, HI, and Other Events in US Radio Astronomy

by Doc Ewen, © 2003

Slide 12: Two Roads that Crossed in the Wood - Growth of US Radio Astronomy in the 1950s and 1960s

[Texas Towers 10 KW UHF power amplifier]

The Texas Towers 10 KW UHF power amplifier. The name on the Texas Tower transmitter is National-Ewen Knight. Ewen Knight built the first high power transmitters for Lincoln Lab. Transmitters began to compete for time with my interest in receivers, so I sold out my interest in transmitters to the National Radio Company in Waltham, MA. Credit: Photo courtesy of Doc Ewen.

Slide 13
Modified on Wednesday, 26-Jan-2005 08:44:57 EST by Ellen Bouton