EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: shadowcomputer on March 11, 2013, 09:29:55 pm

Title: High Voltage Probe Fluke 80K-40
Post by: shadowcomputer on March 11, 2013, 09:29:55 pm
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?
Title: Re: High Voltage Probe Fluke 80K-40
Post by: nicknails on March 11, 2013, 11:46:51 pm
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.
Title: Re: High Voltage Probe Fluke 80K-40
Post by: bustedcap on March 13, 2013, 08:55:57 pm
Watch Blog #85 and roll your own http://www.eevblog.com/2010/05/08/eevblog-85-high-voltage-oscilloscope-probe-design/ (http://www.eevblog.com/2010/05/08/eevblog-85-high-voltage-oscilloscope-probe-design/)