"How to Make Extra Money Fixing Radios", NRI 1949 Edition
Or, How To Become a Part-Time Radio Repairman In 35 Easy Lessons.
The National Radio Institute (NRI) 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)
This was a find on a well-known auction website. Each booklet is about 4 1/2" x 8", about 20 to 21 pages in length, and have black & white illustrations sprinkled throughout. Accompanying the booklets were some additional materials, some including the mailing envelopes with the name of the fellow who originally bought the set from NRI, Mr. Ilber Yoder of Ohio. I don't think all of the booklets were opened; they're in excellent shape.
All documents open in a new window. Many thanks to ARF (AntiqueRadios.com Forum) for the genesis of the idea to put these online. I've scanned these myself. More to come, as I scan them.
- No. 1 - How Radio Receivers Are Serviced
- No. 2 - How To User Radio Tools
- No. 3 - Equipment Used by Servicemen
- No. 4 - How To Remove and Overhaul the Chassis
- No. 5 - How To Restring Dial Cords and Set Push Buttons
- No. 6 - How To Test and Replace Resistors and Volume Controls
- No. 7 - How To Test and Replace Condensers
- No. 8 - How To Test Tubes
- No. 9 - How To Test and Replace Coils, Chokes, and Transformers
- No. 10 - How To Test and Repair Loudspeakers
- No. 11 - How To Inspect a Chassis for Surface Defects
- No. 12 - How To Put Up Antennas
- No. 13 - How To Repair Marred Radio Cabinets
- No. 14 - How To Start a Spare-Time Service Business
- No. 15 - How Much To Charge for Your Work
- No. 16 - How To Plan a Professional Workshop
- No. 17 - How Professional Servicemen Repair Receivers
- No. 18 - How Circuit Diagrams Are Used in Servicing
- No. 19 - How To Find the Defective Part with an Ohmmeter
- No. 20 - How To Find the Defective Part with a Voltmeter
- No. 21 - How To Fix a Dead Receiver
- No. 22 - How To Fix a Receiver That Hums
- No. 23 - How To Fix a Receiver That Squeals and Motorboats
- No. 24 - How To Fix a Noisy Receiver
- No. 25 - How To Fix a Receiver That Distorts
- No. 26 - How To Align Simple One-Band Receivers
- No. 27 - How To Align All-Wave Superheterodynes
- No. 28 - How To Fix a Weak Receiver
- No. 29 - How To Fix an Intermittent Receiver
- No. 30 - How To Service A.C.-D.C. Receivers
- No. 31 - How To Service Three-Way Portable and Battery Receivers
- No. 32 - How To Service Auto Receivers
- No. 33 - Recognizing Complaints Not Caused by Receiver Defects
- No. 34 - How To Service F.M. Receivers
- No. 35 - How To Go into Full-Time Servicing
All of the booklets were scanned at 150 dpi, greyscale. Diagrams and graphics look pretty good, but photos are half-toned and these are less successfully recorded. These booklets were printed on essentially, a type of newsprint, and scan quality is limited by the quality of the 63-year-old booklets. What you see is pretty much what is on the page.
Scanning and Preparation Tools are:
Canon CanoScan LIDE 20 attached to a PC running Ubuntu 11.10 on a dual-core, AMD-64 motherboard, using Simple Scan for scanning and PDFMod for building PDFs and arranging pages in PDF Output. GIMP Image Editor 2.6.11 was used for any touch-up or image scaling.