Some form of vacuum tube tester is a necessity in every radio laboratory. The vacuum tube tester herewith described is the result of an effort to design a simple instrument suitable for routine work, and which could be left permanently connected to the lighting circuit thus being always ready for use.
Proceedings of the Iowa Academy of Science
© Copyright 1926 by the Iowa Academy of Science, Inc.
Helmick, P. S.
"A Vacuum Tube Tester for Routine Work Using Alternating Current,"
Proceedings of the Iowa Academy of Science, 33(1), 244-246.
Available at: https://scholarworks.uni.edu/pias/vol33/iss1/64