Bob Davis sent me a link to Mike Yancey's (KM5Z) website where there is a scanned
version of the 1948 National Radio Institute (NRI) home study course for radio technicians.
It is a very extensive collection of 55 volumes (PDF format) covering topics like
Simple Radio Circuits and Meters,
Radio Coils and How They Work,
How Detectors Work in Radio and Television Receivers,
Current, Voltage and Resistance Measurements,
and
How to Eliminate Man-Made Interference. KM5Z
also has some other good content that you might be interested in while you're there
like a 1958 edition the RCA Radio & TV Course, online calculators
for toroids, inductor Q, voltage dividers, and antenna field strength, and radio
restoration projects.
Posted August 26, 2013
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