Rushy
Junior Member level 1
My first post! ..and my first electronic project since the 1980s!
I want to design an oscillator running at 440 Khz to experiment with an inductive coupling circuit I have. Basically I have a small coil that resonates at 440 Khz and I want to drive a much larger coil with this frequency to see if I can increase the coupling distance to around 6 inches everywhere inside the larger coils diameter. I don't know what current I will need but I'd like to try up to 1A as a start. I've looked at standard circuits such as Colpitts, Hartley & Wien and I wonder if a transistor of sufficient power rating and freq. will work, and if such a transistor exists. Some info. I've read suggests I may need to use MOSFETs? I have no knowledge of them or what circuit I could use.
To summarise my requirements:
Freq. 440 KHz (trim +/- 10 KHz)
Waveform: typically sine or pulse but quality not so important
Load: large coil air cored. e.g diameter 12 ~ 18 inches.
Any pointers to where to start would be much appreciated!
Rushy
I want to design an oscillator running at 440 Khz to experiment with an inductive coupling circuit I have. Basically I have a small coil that resonates at 440 Khz and I want to drive a much larger coil with this frequency to see if I can increase the coupling distance to around 6 inches everywhere inside the larger coils diameter. I don't know what current I will need but I'd like to try up to 1A as a start. I've looked at standard circuits such as Colpitts, Hartley & Wien and I wonder if a transistor of sufficient power rating and freq. will work, and if such a transistor exists. Some info. I've read suggests I may need to use MOSFETs? I have no knowledge of them or what circuit I could use.
To summarise my requirements:
Freq. 440 KHz (trim +/- 10 KHz)
Waveform: typically sine or pulse but quality not so important
Load: large coil air cored. e.g diameter 12 ~ 18 inches.
Any pointers to where to start would be much appreciated!
Rushy