R.F. Oscill'motor': Can You Make a Powerful Oscillator?

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SUMMARY

Transforming a DC motor into a powerful RF oscillator is not feasible due to the nature of electrical noise produced by the motor's brushes. Instead, an AC generator can effectively generate RF signals, a method utilized in the early days of radio technology. However, modern regulations require that such signals be well-filtered to prevent interference with legitimate communications. While basic components like inductors, capacitors, and transistors can create oscillators, they do not provide the stability of contemporary methods such as crystal oscillators, voltage-controlled oscillators (VCOs), or phase-locked loops (PLLs).

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PhysicoRaj
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Hi,
Can you turn an electric (DC) motor into a powerful R.F. oscillator? I see that an ordinary motor is already an oscillator which produces noises in the receiver, but One that produces a sharp, distinct, recognizable signal (or noise) (of any frequency) in a receiver? I just don't want to use any electronic components bcuz I can just take to those simple a.m transmitters if I used transistors and condensers.. an 'electrical' method would do.
Thanks.
 
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PhysicoRaj said:
Hi,
Can you turn an electric (DC) motor into a powerful R.F. oscillator? I see that an ordinary motor is already an oscillator which produces noises in the receiver, but One that produces a sharp, distinct, recognizable signal (or noise) (of any frequency) in a receiver? I just don't want to use any electronic components bcuz I can just take to those simple a.m transmitters if I used transistors and condensers.. an 'electrical' method would do.
Thanks.

No, not really. The electrical noise you hear is from the sparks from the brushes making and breaking contact.
 
But on the other hand ... you can use an AC generator to produce a RF signal. This was done in the very early days of radio when there were few transmitters like that around.
Now days it would be strongly frowned upon without the output of the generator being well filtered to stop harmonics etc that would cause interference noise right across the spectrum upsetting other legit users

Dave
 
davenn said:
But on the other hand ... you can use an AC generator to produce a RF signal.
But it would need some turning to go on with.. so I think of only inductor... some capacitors and resistances( 1 or 2 transistors would do). A simple oscillator that can be modulated by a signal from a microphone.
 
PhysicoRaj said:
But it would need some turning to go on with.. so I think of only inductor... some capacitors and resistances( 1 or 2 transistors would do). A simple oscillator that can be modulated by a signal from a microphone.

the generator itself IS the oscillator. This is the way it was done back in the early days of radio. Nowhere near as stable as today's crystals, VCO's and PLL's etc but it worked :)


Dave
 
Thanks..
 

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