Hello friends!!!
I am doing ckt.3(3 transistor spy amplifier) as project of:-**broken link removed**
I think the 100n cap across the mic. would behave as short even for mid freq..And what it means by "if the 100n across the microphone is removed, the circuit feeds-back almost constantly." Pls. explain.
The last stage is a direct coupled one. So o/p may be above 0ref. & as the spk. is directly connected this may damage the spk..
Also, is the last transistor used as a switch?(since no biasing is used)
Would the direct 1.5V across that one not cause a problem?
While doing a dc analysis, should the 32Ω impedance of the spk. be considered? (or else take it as a short)
I want to make an option for controlling volume. Will a pot do? Where it should be used & of what value? Also a logarithmic/linear? Pls. explain how we decide these parameters(value,type,position)?
I am new to this field. SO, pls. clear my doubts.
Thanx (in advance)!!!
I am doing ckt.3(3 transistor spy amplifier) as project of:-**broken link removed**
I think the 100n cap across the mic. would behave as short even for mid freq..And what it means by "if the 100n across the microphone is removed, the circuit feeds-back almost constantly." Pls. explain.
The last stage is a direct coupled one. So o/p may be above 0ref. & as the spk. is directly connected this may damage the spk..
Also, is the last transistor used as a switch?(since no biasing is used)
Would the direct 1.5V across that one not cause a problem?
While doing a dc analysis, should the 32Ω impedance of the spk. be considered? (or else take it as a short)
I want to make an option for controlling volume. Will a pot do? Where it should be used & of what value? Also a logarithmic/linear? Pls. explain how we decide these parameters(value,type,position)?
I am new to this field. SO, pls. clear my doubts.
Thanx (in advance)!!!