Hi, correct you are right. These are my questions:Hello,
What is the question?
It looks like a ZN414 + LM386 circuit.
Oh dear, it was nearly forty minutes and no one answered all of your homework questions for you. What is this world coming to?Hello, are you there?
Most of your answers will get little to no credit.Ok Thank you.
This is the answer that i have so far:
1. The reason why the meter reading is zero volts is because AM radio circuits works under AC signals
2.The voltmetere will read a different of 1.5 v with the ground being most positive. Electrical parts works as a different in peotential.
3.The Capacitors that have no effects on the turning radio are C1 and c3, C2 and C4.
4.The wiper arm of R3 have to move in the opposite directions to increase volume.
5.Three advantages of printed circuits board are : Ease of repair and Diagnostic, Saving of time, and Low cost.
6.L-C (indutor and Capacitor) form the tuning network.
7. Four of the six components that forms the AM tuner are C1,L1,C2 and L2.
8. The decoupling capacitor at position (G) removes the radio frequencies by passing them to ground.
9.In the AM circuit, the potentiometer controls the volume and the speaker couples the tuner's audio output signal to the volume control
10.In the AM circuit, the LM386 is the power audio amp.
Ok, So should I say because DC meters is not suppose to meassure AM signals?Most of your answers will get little to no credit.
For instance, for #1 saying that it reads 0 V because AM radio circuits work under AC signals is meaningless. Unless you are going to claim that a DC meter will read 0 V everywhere in that circuit. The question is asking about why the DC measurement across that particular component is 0 V.
Similarly, saying that the direction the wiper needs to move to increase the volume is in the opposite directions is completely meaningless. Opposite direction to what? The direction that decreases it?
Is the signal at the point being measured even an AM signal?Ok, So should I say because DC meters is not suppose to meassure AM signals?
What do you base that on? Neither the schematic nor the PCB give any indication (that I can see) about which end of the pot the wiper moves toward when it is turned clockwise.The direction the wiper needs to move to increase the volume is in a clockwise direction.
Which is it? If it is storing electric charge, what is the purpose of doing so? What will that charge be used for later?The purpose of C4 is to block DC current from passing? also to store electric charge?
The switch is in the off position because some capacitor is blocking the DC current from passing? How is that happening? Just what kind of switch is this????The reason why the meter is reading 0 V is because the switch is in the off position of because the capacitors are blocking the DC current from passing?
This OP deserves this kind...Just what kind of switch is this????
The charge is use to operate the circuit.Which is it? If it is storing electric charge, what is the purpose of doing so? What will that charge be used for later?
What else would/could do that job?10.In the AM circuit, the LM386 is the power audio amp. Correct?
by Jake Hertz
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