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LCR Cal Test PCB

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KungFuJosh:
Here's the Gerbers and BOM for the LCR Cal Test V5 PCB.

Note: This is being shared for home & hobby use. Commercial use or reproduction is not approved. Use at your own risk; I take no responsibility for anything.

There are details in the PDF version of the BOM. For example, I used different caps for the 1nF whether testing capacitance or step D factor. The cap listed for step D factor had values in the range needed to be close to the nominal targets.

Also note that there are 2 inductors listed for 100µH. The one marked NRND is easier for most people to measure if they don't have an LCR that supports higher frequencies. I guess grab them while they last. 😉

Thanks,
Josh

PS. If anybody in the US would like, I do have a few unpopulated PCBs available for $10 each plus shipping. Send me a PM if interested.

Martin72:
That reminds me that I should finish assembling my circuit board. ;)

KungFuJosh:
You might want to get at least the replacement inductors from the updated BOM.

I improved the 1nF and lower cap choices too, but the previous ones were probably fine.

Unrelated side note: Mouser sent me the wrong inductors for the 100nH range. They were 100µH instead of 100nH. I'm waiting on replacements for those, but the rest were great. I'll eventually posts some measurements when I'm done screwing around with other things. 😉

KungFuJosh:
Mouser sent me the wrong value for 100nH, but surprisingly, the 805 chip book I bought had some 10nH and 100nH I didn't have any trouble testing. 🤷

Here they are in the SMT test fixture. I have to redo the kelvin tests with the cable correction done. Oops.

KungFuJosh:
Here they are with the test PCB. These values are very sensitive with the kelvin clips.

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