Hi guys I am building a spark-gap transmitter, without the Antenna, according to the diagram that is attached below.
I have used C1=C2=4700uF, R=10K, L=2.16 mH, Frequency=50Hz. My supply voltage=12 Volt.

But I am NOT seeing any spark. I have tested the voltage of the Capacitors. Voltage across C1=12 volt, C2 is 0 volt. Do you have any idea where did I make the mistake?

 

Read the full document from where you got that circuit. You will be dealing with a Few KiloVolts.

https://en.wikipedia.org/wiki/Spark-gap_transmitter


Ramesh

 

I don't think you'll see any sparks with your 12V supply.

 

You need about 100,000 volts per inch of gap to get a spark to jump in air. At that field strength, the air molecules ionize and begin to conduct.

 

Be cautious about these... Higher voltage Spark transmitters put up a LOT of wideband RFI, even if not hooked to an antenna...and can possibly have the FCC down on you... They have NO sense of humor...

The fines are substantial...

 

Oops, I meant 10,000V per inch. That's for DC.

 

Do you guys know how can I generate Kilo Volts for the power supply?

 

You should really start with something less dangerous and learn the basics before playing around with high voltages.

 

I will concur with odinhg's advice

HV will not cry after it kills you if you are careless, tho' those you leave behind likely will.

 

You should really start with something less dangerous and learn the basics before playing around with high voltages.

+1
This is a very bad starting point for a noob. Other than making sparks, is there something you want to accomplish with this project?

 

Do you guys know how can I generate Kilo Volts for the power supply?

You could use a Marx circuit generator, or Eht generator circuit