[volt-nuts] 3458A reference boards on ebay

[John Phillips]

http://www.ebay.com/itm/Agilent-Keysight-HP-3458A-Std-Ref-Board-NIST-certified-/310249132548?pt=LH_DefaultDomain_0&hash=item483c4a1204

Try this one... It has a 30 day return and you get a cal voltage with it.

On Fri, Jan 30, 2015 at 9:21 PM, Joel Setton <setton at free.fr> wrote:

> I'll be happy to design a PCB, and have bare PCB prototypes made.
> Sourcing parts and purchasing them will be another, larger project!
>
> Joel Setton
>
>
> On 30/01/2015 14:24, 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
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-- 

*John Phillips*