>
> snipped-for-privacy@gmail.com wrote:
>
>> I'm looking for a way to switch on and off a high voltage on a very
>> small electrode for some electrospray experiments. Do you have any
>> suggestions on what circuits to use for making max 7kV pulses of about
>> 1ms duration? The capacitance is absolutely minimal since the
>> electrode is only a small metal ring Ø 2mm.
>
>If the switching time of ~10ms is satisfactory, the simplest solution
>could be a high voltage reed relay.
>
>
>Vladimir Vassilevsky
>DSP and Mixed Signal Design Consultant
>
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The problem with reed relays is that they are best switched at zero volts. They have very short life spans when used as a hot switch.
It would be very easy to make a solid state relay for this. Especially since he states that the capacitive load is very low, and there is no resistive load at all.