National Radio Institute    
 Electronics Home Study Course from 1930
The National Radio Institute was a private post-secondary correspondence school based in Washington, D.C..The National Radio Institute was founded by James E. Smith, a high school teacher, in Washington, D.C., in 1914. McGraw-Hill Education purchased NRI and the correspondence division of Capitol Radio Engineering Institute in 1968. The school was renamed NRI Schools, James E. Smith remained as NRI chairman until his death in 1973. James' son, J Morrison Smith, succeeded as president, retiring in 1976. McGraw-Hill announced in 1999 that it would phase out NRI Schools, citing "changes in the marketplace". They ceased operation on March 31, 2002.
NRI
NRI
 
Complete Course in Practical Radio
1-29 30-49
1  
2 Electrical-Circuits
3 Tuning-Circuits
4  
5 Audio-Circuits.
6 Batteries.
7 DC-Theory
8 AC-Theory
9 Radio
10 Detectors
11 Vacuum-Tubes
12 Audio-Amplification
13 RF-Amplification
14 Radio-Sound-Producers
15 Receiving-Antennas
16 Inductance-Condenser-Design
17 Regeneration-Oscillation
18 Batteries
19 Heterodyne-Reception-of-Radio
20 Neutrodyne-Receiver
21 Superheterodyne-Receiver
22 Elementary-Radio-Measurements
23 Standard-Radio-Receiving-Circuits
24 AC-Receivers
25 Screen-Grid-Vacuum-Tubes
26 Superheterodyne-Troubles-and-Remedies
27 Radio-Battery-Chargers
28 Battery-Eliminators
29 Radio-Interference-and-Elimination
30 Changing-Sound-to-Audio-Frequency-Current
31 History-of-Radiotelephony
32 Transmitting-Vacuum-Tubes
33 Power-Supply-For-Transmitting-Tubes
34 Standard-Tube-Circuits-for-Broadcast-Circuits
35 Operating-Principles-of-Broadcasting-Transmitters
36 Amateur-Short-Wave-Transmitters
37 Design-and-Installation-of-Short-Wave-Transmitters
38 Operating-a-Broadcast-Station
39 Transmission-Receptio-of-Pictures-by-Radio
40 Trans-Atlantic-Radiotelephone-Stations
41 Piezo-Electric-Christal-Control-for-Transmitters
42 Construction-and-Operation-of-Power-Amplifiers
43 Radio-Prospecting
44 Short-Wave-Beam-Transmission
45 Aircraft-Radios
46 Television
47 Distant-Control-by-Means-of-Radiant-Energy
48 Public-Address-Systems
49 Direction-Finders