Quote:
Originally Posted by mhennessy
I certainly follow your reasoning, but twice, from different suppliers? I just can't shake the feeling that it's too much of a coincidence, even given the context...
|
Two different suppliers; same type of chip: AD584. Both chips almost certainly 're-cycled / salvaged'. Both boards designed to do the same task. Source: same country - China.
In the final analysis, there are only two possibilities.
1. Both were faulty upon arrival. (Although they might have been O.K. when they left China).
2. I damaged both during initial testing.
Now I do not wish to sound unduly arrogant, but I am quite confident in my technical knowledge and skills to rule out possibility #2. Therefore . . .
------------------------
The two suppliers: just a bit of info. about each. I believe that what follows is in the Public Domain, so there should not be a breach of confidentiality.
First supplier. Board was a small pcb about 1 inch by 1 inch. Just the AD sitting on it and some jumpers. When I was in a dialogue with him (he was located in China), I distinctly got the impression that he was running a 'one man and his dog' outfit.
Second supplier. Board contained a few SMT components in addition to the AD; the pcb was housed in a perspex case. Now that supplier was located in the U.K., but it became apparent that he, in turn, got the items he was selling from his boss in China.
Al.