Products > Test Equipment

Precision AC current source with 1A range?

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AVGresponding:

--- Quote from: HighVoltage on March 10, 2023, 09:40:54 am ---
--- Quote from: AVGresponding on March 10, 2023, 06:45:11 am ---
--- Quote from: HighVoltage on March 09, 2023, 06:55:53 pm ---For that purpose I use the Clarke Hess 828 calibrator.
If you are patient, they show up from time to time cheap.

--- End quote ---

Me too! Mine is badged as a "RFL 828" though.

--- End quote ---
I had no idea that the Clarke Hess was sold rebadged as a RFL 828
Thanks for this info.

There is one on ebay right now for US $1,425
https://www.ebay.com/itm/333935224413

--- End quote ---

Bloody hell... mine was less than £100, shipped! Heavy bugger too...

wn1fju:
Another vote for the Valhalla 2500 series.  I have mine hooked up to a Fluke DC calibrator and thus I have a current calibrator (0.01%).  My 2500 will do 2A and will also do AC current (with a supplied AC voltage) up to 10 kHz.

The build quality, unfortunately, seems pretty average.  I've attached a picture.  A few op-amps, a few precision resistors, and that's about it. 

I see a few currently listed on eBay, but the prices are absurd (several hundred dollars asked).  I wouldn't pay more than about $75 given what is inside. 

maxwell3e10:
I got this Clarke-Hess 5050 precision current source. Couldn't find any information about it, but seems to work up to about 100 kHz. I haven't checked the accuracy or output impedance yet.

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