High Voltage Probe Fluke 80K-40

[shadowcomputer]

I need a high voltage probe to measure voltage output of a fly-back transformer. I have been looking at the Fluke 80K-40, but it's kinda pricey. I was wondering if there is anything cheaper out there that is safe?

[nicknails]

How much voltage are you talking about?  Ebay has a bunch of 80K-40 and 80K-6's depending on your budget.  The prices seemed reasonable to me.  I've used some high value resistors to make a poor-mans probe.  I think it was a 1000M Ohm and a 1M Ohm, both were precision resistors.  Won't have the accuracy of a professional probe, but does the trick for some hobby stuff.

[bustedcap]

Watch Blog #85 and roll your own http://www.eevblog.com/2010/05/08/eevblog-85-high-voltage-oscilloscope-probe-design/