Forest Hill, California: R & L Technical Publishers, 1977. Revised Edition. Paperback. Quarto, Black taped spine, stapled, illustrations, diagrams, microwave and electronic symbols, mathematical signs and symbols. Very good + condition. Item #10654
"In 2020, the traveling wave tube amplifier was added to the Space Foundation's Space Technology Hall of Fame. And as of 2022, the TWT on Voyager 2 is still plugging away, transmitting data as it continues to make the journey through interstellar space.....Jan 31, 2023"