didier at cox.net
Sat Aug 14 22:18:15 UTC 2010
Once I had a batch of JANTX 2N2222A (with all the paperwork) that were PNPs. They actually were marked JANTX 2N2222A. This was for a mil job in the 80's. We did not fool around with the mil specs back then.
I was a young engineer then and not all that involved in the process, so I was kept somewhat out of the process that followed. I wish I has seen QA and purchasing explain that one :)
Sent from my BlackBerry Wireless thingy while I do other things...
From: jimlux <jimlux at earthlink.net>
Sender: time-nuts-bounces at febo.com
Date: Sat, 14 Aug 2010 14:42:39
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: Re: [time-nuts] Simulation
Hal Murray wrote:
>> Line got moved to other side of big ocean. Process got " tweaked" beta is
>> now 4x what it was.
> I'm pretty sure that military grade parts have paperwork and processes to
> cover that case. I expect it costs a lot.
> I think the same sort of service is available to high volume customers at a
> less than military price.
In the space business, we call it "traceability to sand"... you haven't
lived til someone has a failed 2n2222, somwhere on some piece of
critical hardware, and they issue a GIDEP alert, and then the mission
assurance folks call you up and ask, "you don't by any chance have
2N2222's in your flight hardware do you?".. then there's the whole
manufacturer and date code hunt.. Looking through the build
documentation to find out. (or worse yet, if you had decided for some
reason to use the prototype, which you didn't keep such good records on,
but which you have photos of, and trying to read the date codes off the
assembled item with a magnifying glass)
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