Level: 2
Category: Vocations
Year: 1938

Radio Electronics

  1. Explain with diagrams, where helpful, the input devices for radio, such as antenna, ground; or for electronic devices, such as phono pickup, FM tuner, photocell, microphone.
  2. Construct a suitable radio receiving antenna that would work properly in connection with a broadcast or short wave receiver, or construct a phono pickup, photocell, or microphone.
  3. Explain the use and operation of various important components of a simple receiving set (coils, variable capacitors, fixed capacitors, resistors, transistors or tubes, diodes, and transformers).
  4. Identify the value of resistors by the color code.
  5. Know Ohm's Law and how it is applied.
  6. Construct a simple radio (either tube or transistor) including power supply, which will satisfactorily receive stations 100 miles away , or construct a high-fidelity amplifier, photocell guard or counter, control device.
  7. Draw from memory, using proper symbols, the complete wiring diagram of the device constructed under #4.
  8. Show proficiency in trouble shooting on simple receivers or electronic devices of three to six tubes or transistors, being able to follow routine tests, such as removing tubes or transistors and testing them, replacing them correctly, testing for sensitivity, shorted capacitors, and more outstanding common ailments.