Figure 4B.6. This is a block diagram. On the left is an antenna which feeds into the first block. This block is labeled, quote, RF amplifier with two tuned circuits, one on the input, and the other on the output. End quote. The output of the RF amplifier block feeds into the block labeled, quote, converter. End quote. The output of the converter block feeds into the block labeled, quote, 455 kHz I F amplifier. End quote. The output of the I F amplifier feeds into the block labeled, quote, detector. End quote. One of the outputs from the detector block feeds to the input of the block labeled, quote, audio amplifier. End quote. The other output from the detector block is labeled A G C and feeds into the I F amplifier, converter, and R F amplifier blocks. End of verbal description.
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