The impedances of the loudspeaker voice coils must be matched to those of the power amplifier tubes for satisfactory ... If the loudspeakers are located more than about fifty feet from the power amplifier, this transformation should be made in two steps. ... to match a load of 500 ohms, and the speakers should have transformers to match the 500 ohms to their voice coils. ... Experimental Procedure A. Draw on the blackboard a complete circuit diagram of the public- address amplifier.
|Title||:||Laboratory Manual for Fundamentals of Radio ...|
|Author||:||C. W. Caldwell|