Re: [volt-nuts] Could you fall an HP 4-wire LCR meter into thinking you have a negative resistor?

2015-09-01 Thread Bob Albert via volt-nuts
You can do a similar thing by connecting the measuring leads 'outside' the current source leads or reversing the measuring leads.  It's not a valid measurement, just the same as putting a signal into one pair of leads without connecting the other.  The instrument isn't measuring resistance; it's

[volt-nuts] Could you fall an HP 4-wire LCR meter into thinking you have a negative resistor?

2015-09-01 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
I just sent an email by mistake, failing to finish it before hitting "send". The recent discussion about creating inductor standards from a capacitor and two resistors got me thinking. I suspect if you connected up an HP (or similar) LCR meter in a way not intended, you could make it appear you ha

Re: [volt-nuts] Anyone know how to make stable inductors?

2015-09-01 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 20 August 2015 at 02:38, Todd Micallef wrote: > Here is a DIY guide to making some lab standards. It is detailed with some > component values. > > > http://nopr.niscair.res.in/bitstream/123456789/4848/1/JSIR%2065%286%29%20510-513.pdf > As I wrote before, I think this is of dubious use, as yo