Or, How To Become a Radio Repairman In 55 Easy Lessons.

The National Radio Institute was a private post-secondary correspondence school based in Washington, D.C. NRI was founded by James E. Smith, a high school teacher, in 1914. McGraw-Hill purchased NRI in 1968, and ceased operations March 31, 2002. (From wikipedia)

All documents open in a new window. Many thanks to ARF (AntiqueRadios.com Forum) member ‘oakdust’ for the original PDFs, wrgarrett for the swell ‘NRI Home Study Ad’, and ARF users wrgarrett and oakdust for optimizing and shrinking certain volumes.

This site serves as a mirror of the original posting.

• Vol 1- Introduction to Radio
• Vol 2 – How Radio Programs Are Sent From The Studio To Your Home
• Vol 3 – Simple Radio Circuits And Meters
• Vol 4 – Getting Acquainted With Receiver Servicing
• Vol 5 – Radio Resistors And How They Are Used
• Vol 6 – Radio Coils And How They Work
• Vol 7 – Radio Condensers And How They Work
• Vol 8 – How Radio And Electronic Tubes Work
• Vol 9 – How Tuned Circuits Function – Coupling Radio Circuits
• Vol 10 – How Tubes Work In Typical Radio Stages
• Vol 11 – How Iron-Core Coils And Transformers Operate In Radio Circuits
• Vol 12 – How Operating Voltages Are Obtained From An A.C. Power Line
• Vol 13 – Special Power Supplies For Radio Equipment
• Vol 14 – How Sounds And Scenes Are Converted Into And Reproduced From Electrical Signals
• Vol 15 – Low-Frequency Amplifiers For Sound And Television Receivers
• Vol 16 – Radio Frequency Amplifiers For Sound And Television Communication
• Vol 17 – How Detectors Work In Radio And Television Receivers
• Vol 18 – How Practical Requirements Changed Receiver Circuits
• Vol 19 – Manual And Automatic Volume Controls
• Vol 20 – How Signal Currents Are Kept In Correct Paths
• Vol 21 – The Vacuum Tube As An A.C. Generator In Radio-Television Circuits
• Vol 22 – Peak And Band-Pass R.F. Tuning Circuits
• Vol 23 – How Broadcast, All-Wave, And Television Superheterodyne Receivers Work
• Vol 24 – Tone Control, Volume Expansion And Noise Limiting Circuits
• Vol 25 – Light-Sensitive Cells For Control Circuits
• Vol 26 – How Sound Reproducers Operate
• Vol 27 – How Cone-Type Loudspeakers Work
• Vol 28 – Current, Voltage And Resistance Measurements
• Vol 29 – Vacuum Tube Voltmeters – Cathode Ray Oscilloscopes
• Vol 30 – Measurements At Audio And Radio Frequencies
• Vol 31 – Tuning Indicators And Automatic Frequency Controls For Radio Receivers
• Vol 32 – How To Use Circuit Diagrams And Locate Chassis Parts
• Vol 33 – Behavior Of Radio Waves And Receiving Antennas
• Vol 34 – Frequency-Modulated Signals – The F.M. Receiver
• Vol 35 – Automatic Tuning Control Systems
• Vol 36 – Professional Radio Servicing Techniques
• Vol 37 – How To Isolate The Defective Section And Stage
• Vol 38 – How To Isolate The Defective Circuit And Part
• Vol 39 – Tuning Circuit Troubles – Alignment
• Vol 40 – Using The Cathode Ray Oscilloscope In Radio Servicing
• Vol 41 – How To Eliminate Hum, Squeals And Motorboating
• Vol 42 – How To Eliminate Distortion – Servicing Loudspeakers
• Vol 43 – Servicing Noisy And Intermittent Receivers
• Vol 44 – Installation And Service Of Auto Radios And Farm Receivers
• Vol 45 – Receiver Revitalization – Tube Testers
• Vol 46 – How To Eliminate Man-Made Interference
• Vol 47 – How To Choose And Install Replacement Parts
• Vol 48 – Servicing Record Changers
• Vol 49 – Introduction To Public Address
• Vol 50 – Acoustics In Public Address Work
• Vol 51 – P.A. Transmission Systems
• Vol 52 – Commercial P.A. Systems
• Vol 53 – Special P.A. Systems
• Vol 54 – Maintenance Of P.A. Systems
• Vol 55 – Requirements Of A Television System