[Coco] Coco .... having bad luck with Jameco components

[J.P. Samson]

On Apr. 6, 2013, at 9:24 PM, RJRTTY at aol.com wrote:

> In a message dated 4/6/2013 8:21:00 P.M. Eastern Daylight Time,
> mkgraham at gmx.com writes:
>
>> Which regulator is it?  Standard 7805 or something  else?
>
>
> Yes it is  the 7805.   I tested all of them in and out of  circuit.
> They acted the same within each batch.
>
> I think we are seeing the bottom of the barrel as someone suggested
> in another post.    The bad news is I may have to change my  design
> now to accommodate this development....  I hate that.....   :(



Seems amazing to me that such a basic, well-known component would be  
subject to such failure rates, especially since there are still big- 
name vendors providing these regulators (e.g. Texas Instruments,  
Fairchild, ON Semiconductor).  Heck, DigiKey indicates that TI has 4  
million of them currently available from the factory; that doesn't  
sound like they're EOLed just yet.  Also, would they not be taking  
samples and testing during production runs?  Perhaps there has been  
improper ESD handling precautions?  Who knows?

Is it worth trying to order some from a different seller (e.g. Mouser,  
DigiKey, Newark)?

But yes, for the hobby-oriented the transition to surface mount  
components is a source of great frustration.

-- JP