Here is
a circuit with a very bad layout. The circuit may work but it relies on
a "Q-factor" from the coil and capacitor in the tank circuit to produce
a high voltage. This high voltage gives the circuit a good range.
Firstly the coil and capacitor should be near each other. The coil should not have long leads. and a 22n capacitor should be across the supply to give the circuit better performance. The value of C2 is too high. It should be 10p. The coil should be 5 turns. The electret mic should not be connected directly to the base of the transistor. As you can see, the circuit is full of faults.
You can learn a lot from other people's mistakes.
Firstly the coil and capacitor should be near each other. The coil should not have long leads. and a 22n capacitor should be across the supply to give the circuit better performance. The value of C2 is too high. It should be 10p. The coil should be 5 turns. The electret mic should not be connected directly to the base of the transistor. As you can see, the circuit is full of faults.
You can learn a lot from other people's mistakes.
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