[volt-nuts] 3458A reference boards on ebay

[Dave M]

I'd go for a deal like that as well.  I have a small number of LM399s that 
I'd like to put to use, as well as a couple LTZ1000A references.  A project 
using either type of reference would be very exciting for me.
I have a few old Fluke differential meters that have lots of nice low 
tempco, high quality resistors that might finally find a useful project such 
as this.

Count me in,
Dave M.


Dr. David Kirkby (Kirkby Microwave Ltd) 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