[volt-nuts] Making a reference IC

[Richard Moore]

I bought my used 3458A ref board on eBay about 5 years ago from a seller in CO. It is the genuine article. I can't see how or why anyone would bother to make a really good fake board (complete with Vishay metal foil resistors) with a fake LTZ 1000A and sell it for $99.... If these boards were coming from China, maybe...

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Snip//////
> On Sep 14, 2015, at 4:58 PM, volt-nuts-request at febo.com wrote:
> 
>> On 14/09/2015 12:08, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
>>> On 13 Sep 2015 09:15, "M K" <m1k3k1 at hotmail.com> wrote:
>>> There has been some of those references available second hand from ebay,
>> mostly pulled, but some may be counterfeit, so look for sellers with
>> pictures showing it as old..
>> 
> Nick Gilbert wrote:
> FWIW-I recently contacted a seller of 3458A ref boards asking how/where he was able to get  them. He claims that he received many as NOS from a closed assembly plant-you folks would know better than I if that story holds water. He also says that many are purchased when folks upgrade to the 4ppm option.
> 
> I would agree that any of the $99USD are likely fake.  //////snip