Finding/Implementing a digitally-controlled high-voltage switch

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In summary, the person is looking for a switch or relay to control high voltages based on a digital input signal. The desired device should have a switching frequency of 100 Hz to 100 KHz and be able to handle input voltages of 0 to 5 kilovolts DC with an output signal of 0 to 5 kilovolts, and a capacitive load. The cost should not exceed $100 per switch. Suggestions for a suitable device, such as a tube, are welcome.
  • #1
Marco Polo
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I am looking for a switch or relay to switch high voltages on and off based on a digital input signal. Below are the characteristics of the device I would like to find.

Switching frequency: 100 Hz to 100 KHz
Input (control) signal: square waves, 3 to 12 volts amplitude, 100 Hz to 100 KHz range
Input voltage to be switched: 0 to 5 kilovolts DC, 1 milliamp (max)
Output signal: square waves, 0 to 5 kilovolts amplitude
Load: capacitive load (several picofarads)
Cost: not more than $100 per switch

Thanks for any info you can contribute to this!
 
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  • #3
skeptic2, thanks for the reply. Do you know if these tubes will will operate at a frequency of up to 100 KHz at a voltage of 5 KV? Taking a look at the link provided, it seemed that the tubes operate at only a few hundred hertz? Or maybe I did not interpret the headings correctly?

Also other ideas are welcome from anyone.
 
  • #4
Those maximum frequencies would be in MHz. ie 200 MHz is 200 000 000 Hz. So, 100 KHz would be no problem.

These are high powered transmitting tubes and they are usually very expensive if you buy them new.

You may be able to hunt for second hand ones on Ebay or at Ham Radio gatherings.
 
  • #5
vk6kro, thanks for the info!
 

1. What is a digitally-controlled high-voltage switch?

A digitally-controlled high-voltage switch is an electronic device that allows for the control of high voltage levels through digital signals. It is commonly used in industrial and scientific applications where precise and fast control of high voltages is necessary.

2. How does a digitally-controlled high-voltage switch work?

A digitally-controlled high-voltage switch works by using a digital control signal, typically from a microcontroller or computer, to activate a solid-state switch. This switch then allows for the flow of high voltage through the circuit, which can be turned on or off based on the digital signal.

3. What are the benefits of using a digitally-controlled high-voltage switch?

There are several benefits to using a digitally-controlled high-voltage switch, including increased precision and speed of control, reduced size and complexity compared to traditional mechanical switches, and the ability to integrate with other digital systems.

4. What factors should be considered when implementing a digitally-controlled high-voltage switch?

When implementing a digitally-controlled high-voltage switch, it is important to consider the voltage and current ratings of the switch, the speed and accuracy of control, the type of digital signal interface, and any necessary safety features to protect against high-voltage surges or faults.

5. Are there any potential risks or challenges associated with using a digitally-controlled high-voltage switch?

As with any electronic device, there are potential risks and challenges associated with using a digitally-controlled high-voltage switch. These may include the risk of electrical shock, the need for proper grounding and shielding, and the potential for component failure if not designed and implemented correctly. It is important to follow safety guidelines and consult with a professional when working with high-voltage systems.

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