Homebrew PCBs

In article <cjg0og+qh4t@...>,
   Dave Mucha <dave_mucha@...> wrote:
> Hi all,

> I'm looking to measure a 300 volt line and drop it to 5 volts.   One 
> of the many problems is that there is also the potential of a 15kV 
> spike on the line.

Is your 300V ac or dc?

What is the source impedence of the 15kV.

Never mind the PCB what are you going to use for connecting wire? !

Definatly keep the high voltage board seperate (I think I would pot it or
enclose in a small plastic box)

Because of the voltage limitations across resistors you will need a long
chain of multiple resistors to make up the top section of your multiplier
to avoid the breaking down unless it is feasible to put surge arrestors
across it.

Stuart