[volt-nuts] 3458A reference boards on ebay

[Todd Micallef]

There is currently a thread on EEVBlog where one has already been built. I
believe it can be purchased once the final layout is completed.

http://www.eevblog.com/forum/projects/project-kx-diy-calibrator-reference-sourcemeter/

Todd

On Fri, Jan 30, 2015 at 8:24 AM, Dr. David Kirkby (Kirkby Microwave Ltd) <
drkirkby at kirkbymicrowave.co.uk> wrote:

> On 30 January 2015 at 12:25, Will <willvolts at gmail.com> wrote:
> > The boards are factory rejects.
>
> I doubt all boards on eBay are in this category. Some are probably
> quite genuine, some may be rejects, and it would never surprise me if
> some are counterfeit. The problem is, I have no idea what ones are
> what.
>
> I don't know what the problems sourcing the parts for making a
> reference would be, but if a number of people wanted to make one from
> parts, perhaps someone could produce a PCB and people contribute
> towards the cost of it. Maybe leave people to get their own reference
> chip, as there are different grades of that. But things like the
> precision resistors may be easier to buy in a quantity of 10 rather
> than 1.
>
> I would certainly not mind buying one if a PCB was available. Even if
> it works out costing a bit more than a 3458A reference from eBay, I'd
> feel a bit happier.
>
> Dave
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