The Rectifier Circuit

We want to have the inner grid negative and the outer grid grounded. To do this we need only the negative output of the NST. The act of converting AC power to DC is called rectification. Since we want to have one polarity we will need to rectify the output of the NST. There many ways to do this but this is the most simplest, all we need is two diodes. These diodes can be bought online or ripped out of an old microwave. Arrange the diodes as follows:

 
Here is the circuit in real life:

The rectifier circuit is done!

Next: Feedthroughs