B Why does my LC circuit not oscillate its energy between Electric & Magnetic fields?

AI Thread Summary
The LC circuit described does not oscillate as expected due to several factors, including insufficient inductance and resistance in the circuit. The inductor's low number of turns and the use of a basic multimeter limit the ability to detect high-frequency oscillations, which may occur at frequencies around 122 MHz. The circuit's oscillation is further hindered by the lack of a proper switching mechanism; using a quartz oscillator and transistors could help sustain oscillations. The compass and multimeter may not effectively measure the transient currents generated, especially at high frequencies. To achieve observable oscillations, modifications to the circuit's components and configuration are necessary.
  • #151
Baluncore said:
Can you hear the oscillator as a silent frequency on the AM radio ?
Yes, at last! It's between 600 and 800, somewhere in between, see for yourself where the slider is:
IMG_20241004_134438.jpg
 
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  • #152
LTspice simulation of your circuit shows that the 1 uF emitter capacitor, C3, seems to pull the frequency up, closer to 1 MHz than the expected 700 kHz.

If you move the AM radio further from the oscillator, you should get a more accurate frequency reading on the smaller signal.
 
  • #153
Baluncore said:
LTspice simulation of your circuit shows that the 1 uF emitter capacitor, C3, seems to pull the frequency up, closer to 1 MHz than the expected 700 kHz.

If you move the AM radio further from the oscillator, you should get a more accurate frequency reading on the smaller signal.
If I place the AM radio 1 centimeter away from the inductor or from the antenna, the 700 KHz frequency goes completely silent. Otherwise, the noise reduces in intensity but not completely. The antenna does not have the right length to emit at a large distance. Half a meter away the noise reappears. It also silences 1400 KHz.
 
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