RSM Vol 19 - How To Find The Defective Part With An Ohmmeter

This 1947 training manual from the National Radio Institute provides a comprehensive guide on using an ohmmeter to diagnose issues in vintage radio equipment. The text emphasizes continuity testing as a primary method for identifying open circuits and shorted components by measuring resistance across specific reference points. Detailed instructions explain how to navigate different power supply configurations, such as A.C. and battery-powered receivers, while using schematic diagrams to pinpoint defects. Beyond basic troubleshooting, the source outlines a practical training plan for students to master testing resistors, coils, and condensers. By interpreting meter readings and understanding circuit behavior, technicians can efficiently isolate faulty parts without unnecessary disassembly.