Thursday, December 2, 2010

Lesson 15: General Class Exam Course G4A

Welcome back!  Here is lesson 15 covering the G4A questions of the General Class question pool.  This lesson deals with Digital Signal Processors, vacuum tube RF power amplifiers, and neutralizing circuits.  This lesson is fairly straight forward with the exception of the questions dealing with the vacuum tube RF power amplifier adjustments.  Unless are already familiar with these amplifiers, the answers may be a bit of a mystery.  Here's the information that I recommend you memorize:

- The reading on the plate current meter of a vacuum tube RF amplifier which indicates correct adjustment of the plate tuning control is a pronounced dip.

- The correct adjustment for the "Load" or "Coupling" control of a vacuum tube RF power amplifier is the maximum power output without exceeding maximum allowable plate current.

Please feel free to leave any comments, suggestions, or questions!  Until the next lesson...


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