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NRI Radio Course+ (1927-1930)

Price: $12.95

This CD contains more than twice the data on the 1929-1930 NRI CD.  It includes all of that CD, plus another complete course, plus other interesting and useful data.  Read on!


In the first decade of the last century, the National Radio Institute, located in Washington, D.C., began selling a home-study course called the Complete Course in Practical Radio. People all over the country learned about the new exciting field of radio in their own homes.  Now you can too. 


This is what I believe is the earliest radio home study course.  With this CD you can use the same instructions technicians used in their time to learn radio theory.  See how radios were constructed in the early days when wireless was still in its infancy.  Give yourself a solid background in radio starting from the ground up.  This CD contains scans of the books from the years 1927 to 1930 which includes two complete home study courses. 

There's more.... 

Not only are there lessons in radio, there are also lessons about applications of wireless technology in other fields such as television, aircraft, beacons, prospecting, etc.   Please scroll down and view the incredible amount of information you'll be getting.

On this CD:

  • You get 2 complete courses of Practical Radio instruction. 
  • You get 24 service sheets for radios from the '20s and '30s.  
  • You get 10 job sheets that show you how to build battery eliminators, etc.  
  • You get 9 work sheets that give you tips on soldering, rejuvenating tubes, etc.
  • You get instructions for building the kits that went along with the course
  • You get a menu system to help you quickly find what you want to learn about.
  • In total, you get a total of 136 lessons and data sheets.   


Key Benefits of Using this Study Course


  •  Become knowledgeable as to how radio waves are transmitted,  received, and converted to audio.
  •  Understand the different circuits within a tube-type radio
  •  Understand what the radio business was like in 1929.
  •  Compare courses from different years to see what improvements were made in radio circuits and components.

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NRI Early Radio Courses CD Contents

(Useful information for modern-day technicians servicing older models.)

Installation of a Battery Charger and Batteries
How to Build an "A" and "B" Power-Pack for Direct Current
Building a "B" Eliminator and Power Amplifier
Building a Plug-in "B" Power Supply Unit
Building a Universal Testing Set and Tube Checker
The Electrolytic Type of Rectifier and Filter for a "B" Eliminator
How to Make Radio Receivers more Selective and Sensitive
How to Build a Simple Tungar Battery Charger for use with 110 Volts A. C.
Using the Farm Lighting Batteries for A, B, and C Radio Current
How to Wire Buildings for Radio

(Schematics and valuable service information about receivers of that era.)

The Amrad Neutrodyne Receiver - Type AC-5
Balancing the Circuits of Radio Receivers
Crosley Sets 4-29 and 5-38
Crosley Sets, Models AC-7 and AC-7C
Crosley Bandbox Receivers (models 601, 602)
The Crosley Model RFL-90 Receiver
Freed-Eisemann Electric Receivers Models NR-60 and 60-A
Servicing the Freshman Masterpiece Receiver
Servicing the Grebe Syncrophase Receiver
Improving the Audio Frequency Amplifier
Installing Antennas - Outside and Inside
The Radiola 20
The Radiola 25
Servicing the Radiola 28
The Radiola 30
Servicing Radiolas III and III-A
Radiola Loudspeaker Model 104
R. C. A. (Uni-Rectron) Power Amplifier Unit (model AP-935)
Rewiring Radio Receivers for A. C. Tube Operation
Starting in the Radio Service Business
The Super-Zenith Batteryless Set Model 17
Trouble Shooting on Radio Receivers
Locating Troubles in Superheterodyne Receivers
Wiring Receivers for "C" Battery, and Power Amplifiers


Work Sheet No. 2: Correcting Common Tube Troubles
Work Sheet No. 3: Installation of the Antenna System
Work Sheet No. 4: Storage Batteries and Rechargers
Work Sheet No. 5: Loud-Speakers and How to Use Them
Work Sheet No. 6: How to Solder
Work Sheet No. 7: Power Tubes - What They are and How They are Used
Work Sheet No. 8: Putting New Life in Radio Tubes
Work Sheet No. 9: Wiring Radio Coils
Work Sheet No.10: Designing Coils for Receivers

1927 - 1928
(These came from the same set. Some were published in 1927, some in 1928, but together they made up a nearly complete set.)
Lesson 1 Elementary Principles of Radio Reception (2nd Edition)
Lesson 2 Principles of Electric Circuits Used in Radio Receivers (2nd Edition)
Lesson 3 Tuning Radio Receiving Circuits (2nd Edition)
Lesson 4 Radio and Audio Frequency Amplifying Circuits (2nd Edition)
Lesson 5 Audio Frequency Amplifiers (2nd Edition)
Lesson 6 Radio Batteries, Chargers, and Eliminators (2nd Edition)
Lesson 7 The Vacuum Tube
Lesson 8 Receiving Antennae and Their Installation
Lesson 9 Radio Reception and the Crystal Detector
Lesson 10 The Three Element Vacuum Tube as a Detector
Lesson 11 The Single-Tube Circuits used in Radio Receivers
Lesson 12 Audio Frequency Amplification
Lesson 13 Radio Frequency Amplification
Lesson 14 General Trouble Shooting in Radio Receivers
Lesson 15 Testing Radio Receivers and Amplifiers
Lesson 16 Inductance and Condenser Design (2nd Edition)
Lesson 17 Regeneration Oscillation and Neutralization
Lesson 18 Radio Batteries their Construction and Operation
Lesson 19 Reflex Radio receivers
Lesson 20 The Neutrodyne Receiver
Lesson 21 The Super-Heterodyne Receiver Development, Design, and Operation
Lesson 22 Elementary Radio Measurements (3rd Edition)
Lesson 23 Standard Radio Receiving Circuits (2nd Edition)
Lesson 24 (missing)
Lesson 25 The Screen Grid Vacuum Tube (3rd Edition)

Radio Retailing and Salesmanship 1928
Definitions of Radio Terms and Symbols 1927 (2nd Edition)
Radio Inventions 1927
Radio Diagrams and Draftsmanship 1927
Radio Service and Repairs 1928

1929     (a complete set -1)
Book 1: The Store - Its Location, Equipment, and Personnel
Book 2: The Art of Buying Radio Merchandise
Book 3: Radio Merchandising: Radio Advertising and Merchandise Display
Book 4: Instructions in Selling in the Retail Radio Field
Book 5: Radio Inventions
Book 6: Radio Journalism
Book 7: How to Manage a Broadcasting Studio
Book 8: Talking Motion Pictures
Book 9: Organization of a Broadcasting Station
Book 10: Radio Retailing and Salesmanship
Book 11: Diagrams and Draftsmanship
Book 12: Practical Servicing of Radio Receivers
Book 13: Choosing a Career in Radio
Book 14: Methods of Testing Radio Receivers

1929 - 1930     (a complete set)
Lesson 1: Elementary Principles of Radio Reception
Lesson 2: Principles of Electric Circuits Used in Radio Receivers
Lesson 3: Tuning Radio Receiving Circuits
Lesson 4: Radio and Audio Frequency Amplifying Circuits
Lesson 5: Audio-Frequency Amplifiers and Radio-Speakers
Lesson 6: Radio Batteries, Chargers, and Eliminators
Lesson 7: Fundamental D.C. Theory
Lesson 8: Fundamental AC Theory
Lesson 9: Simple Graphs and Types of Radio Waves
Lesson 10: Detector Action of Crystal and Vacuum Tube
Lesson 11: The Vacuum Tube as an Amplifier
Lesson 12: Audio Frequency Amplification
Lesson 13: Radio Frequency Amplification
Lesson 14: Radio Sound Reproducers
Lesson 15: Receiving Antennas and their Installation
Lesson 16: Inductance and Condenser Design
Lesson 17: Regeneration, Oscillation, and Neutralization
Lesson 18: Radio Batteries: Their Construction and Operation
Lesson 19: Heterodyne Reception of Radio Waves
Lesson 20: The Neutrodyne Receiver
Lesson 21: The Super-Heterodyne Receiver: Development, Design, and Operation
Lesson 22: Elementary Radio Measurements
Lesson 23: Standard Radio Receiving Circuits
Lesson 24: Alternating Current Operated Radio Receivers
Lesson 25: The Screen Grid Vacuum Tube
Lesson 26: Super-Heterodyne Troubles and their Remedies
Lesson 27: Radio Battery Chargers
Lesson 28: Battery Eliminators and Power Amplifiers
Lesson 29: Radio Interference and its Elimination
Lesson 30: Changing Sound to Audio Frequency Current
Lesson 31: History and Development of Radio Telephony
Lesson 32: Transmitting Vacuum Tubes
Lesson 33: Power Supply Apparatus for Transmitting Tubes
Lesson 34: Standard Tube Circuits for Transmitting Tube Circuits
Lesson 35: Operating Principles of Commercial and Broadcasting Transmitters
Lesson 36: Amateur Short Wave Transmitters and Receivers
Lesson 37: Design and Installation of Short Wave Tube Transmitters
Lesson 38: How to Operate a Broadcasting Station
Lesson 39: Transmission and Reception of Pictures by Radio
Lesson 40: Trans-Atlantic Radio Telephone and Relay Stations
Lesson 41: Piezo-Electric Crystal-Control for Tube Transmitters
Lesson 42: Construction and Operation of Power Amplifiers
Lesson 43: Radio Prospecting
Lesson 44: Short Wave Beam Transmission
Lesson 45: Aircraft Radio Transmitters and Receivers
Lesson 46: Television
Lesson 47: Distant Control by Means of Radiant Energy
Lesson 48: Public Address Systems
Lesson 49: Marine and Aircraft Radio Beacon and Directional Finders
Lesson 50: Carrier Current Systems (Wired Radio)

(Instructions for assembling the test kits that went along with the course)
Practical Radio Construction - Unit 1
(Directions for constructing N. R. I. Unit 1 receiving set with crystal detector.)
Practical Radio Construction - Unit 2
(Directions for constructing N. R. I. Unit 2 receiving set with vacuum tube detector.)
Practical Radio Construction - Unit 3
(Directions for constructing N. R. I. vacuum tube regenerative receiving circuits.)
Practical Radio Construction - Unit 4
(Directions for adding one stage of transformer coupled audio frequency amplification to a receiver.)
Practical Radio Construction - Unit 5
(Directions for adding radio frequency amplification to a receiver.)
Practical Radio Construction - Unit 6
(Directions for connection reflex and short wave hook-ups.)