- Thread Starter
- #261
Yes, the process is the same and that is what I am planning to do. The reason it is tricky is that you need a 10:1 ratio for the cap as well for what is inside the AP which makes it just 20 pf. There is enough capacitance elsewhere in the wiring and such, together with accuracy issues that makes an exact number impossible. I have bought a few 10 pf caps so I have more flexibility. Scope probes have adjustable caps for this purpose as you know but we are talking about far higher voltages here and I did not search to see if there are any adjustable caps that way.You could consider paralleling a (very small) capacitance, maybe even a resistor in series with it, to compensate for the loss of higher frequencies.
The same thing is done with scope probes, here it usually is a small trimmer cap which is easily calibrated by looking at a 1kHz squarewave that is usually provided by the scope itself.