Block diagram of a typical AJ6.

The ferrite antenna is shown on the left. It is symbolized by two parallel dashed lines with two windings a smaller one called the base winding and a larger one called the tuned winding. The base winding on the antenna is shown with both ends connected into the left end of the converter block. The tuned winding is tuned by one section of the variable capacitor. The bottom end of the tuned winding is connected to circuit common. A line comes out of the bottom of the converter block and it goes to a tap on the tuned winding of the oscillator coil. The tap is closer to the bottom than it is to the top. The other section of the variable capacitor is connected across the entire winding. The bottom of the coil is grounded. A line comes out of the right side of the converter block and goes to the top of the collector winding on the oscillator coil. The bottom end of this winding goes to the bottom of the tuned winding on the first I F transformer. A tap on this winding goes to minus 9 volt. The tap is closer to the bottom than it is to the top. A fixed capacitor connects across the entire winding. The base winding on the first I F transformer has both ends connected to the left side of a block labeled I F. A line comes out of the right side of the I F block and it connects to the bottom of the tuned winding on the second I F transformer. The tap goes to minus 9 volt. The second I F transformer is identical to the first already described. Both ends of the base winding on the second I F transformer go to another block labeled I F. A line comes out of the right side of this block and goes to the bottom of the third I F transformer which is identical to the other two. Both ends of the base winding on the third I F transformer go to the left side of a block labeled detector. A line comes out of the bottom of the detector block and goes to the first block labeled I F. This line is labeled A G C which stands for automatic gain control. A line comes out of the right side of the detector block and goes to the top of a potentiometer, known as a pot for short. The bottom of the pot goes to circuit common. The movable contact on the pot goes to the left side of a block labeled audio. A line comes from the top of the audio block and goes to minus 9 volts. A line comes out of the bottom and goes to common. Two lines come out of the right side and go to the speaker. The 9 volt battery has its positive terminal connected to common. The negative side goes through the on / off switch to minus 9 volts.
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