NEETS — Navy Electricity and Electronics Training Series
U.S. Navy / NETPDTC (hosted on Internet Archive, marked Public Domain)
The standard public-domain electricity/electronics curriculum: DC/AC basics, wiring techniques, circuit protection, batteries, generators, motors, antennas/wave propagation, radio — underpins both the electrical-repair and ham-radio content areas.
Editor's notes
1990s era; solid fundamentals but no modern solid-state/digital coverage. Bundle selectively (Modules 1-5 + 10-12 + 19 cover most survival-relevant ground). Archive.org hosting is not itself a license — the underlying Navy work is the PD basis.
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PDF (24 separate module PDFs)
~100-200 MB for all 24 modules
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Source & license
US federal government work (public domain).
Use of this material does not imply endorsement by its publisher or any government agency.
Not medical advice.
This reference is for general education. It is not a medical device and does not diagnose, treat, cure, or prevent any condition. Consult a healthcare professional, and call your local emergency number when help is available.