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Re: Opens and shorts for 4285A LCR meter owners

 

On Mon, 13 Apr 2020 at 04:57, Jared Cabot via <jaredcabot=[email protected]> wrote:

Hi David.

?

Where did you get the BNC connectors for your open and short?
Were they taken from test fixtures or can they be purchased separately?

Thanks!


You can get them on eBay. Search for BNC levers or BNC handles. One does need to cut some BNC plugs up to make these, as you only want the inner part of the plug. I use a grinder and hacksaw.?

HP do make some fixtures with 4 levers, and some with none. Two is a compromise.

I want to make a fixture that allows one to apply a DC offset of up to 30 kV. That will be a challenge. I will probably restrict its use to a lower specification LCR meter I have, as I wrote not want to risk damaging these. At 30 kV, some precautions will be necessary.?
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

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