Nope. I meant 100K to 500K megohm resistor. I know it sounds crazy to me too, but that what it calls for. Some HV probes use resistors in that neck of the woods. I think I have located what I need. Thanks to all for the assistance. Rick/K5IAR I bet he meant 500k or in other words a 1/2 meg resistor. Lee,w0vt