If you're looking for a powerfull, cheap and easy to build RF oscillator, look at the attached schematic. This is what I use. A relaxation oscillator build using a 74HC132.
The second NAND is to create a high duty cycle, which is inverted by the driver making it a low duty cycle. This circuit can easily be adapted to suit your needs.
But if you want the FET to survive, you should take heed of the comments posted by gyula (#17) and citfta (#20) in this thread wardenclyffe-teslas-true-intention.
I think this would be able of frequencies up to 5 MHz (with different R and C, and without the second NAND).
@GSM
Isn't it true that if you make the Q so high, that the LC won't do anything? It would be too selective, it won't start resonating and you won't get your beat frequency.
(not arguing, just asking )
Ernst.
The second NAND is to create a high duty cycle, which is inverted by the driver making it a low duty cycle. This circuit can easily be adapted to suit your needs.
But if you want the FET to survive, you should take heed of the comments posted by gyula (#17) and citfta (#20) in this thread wardenclyffe-teslas-true-intention.
I think this would be able of frequencies up to 5 MHz (with different R and C, and without the second NAND).
@GSM
Isn't it true that if you make the Q so high, that the LC won't do anything? It would be too selective, it won't start resonating and you won't get your beat frequency.
(not arguing, just asking )
Ernst.
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