On 8/27/2012 8:04 PM, Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
> On Mon, 27 Aug 2012 17:23:02 -0400, Ron wrote:
>
>> I wasn't there, but I think it was because of poor quality control.
>
> REPLY:
> I remember in the early early days before manned flight the failures were
> caused
> by overheated inverters, one after the other after the other. Then some
> genius
> at NASA realized that in zero gravity, there is no convection cooling. Stick a
> fan on it, problem solved.
And then they learned about "Tin Whiskers!", particularly when the idea
of ROHS idea came about.
One TV repairman told me that the vast majority of repairs and trouble
calls are mainly caused by ROHS compliant solder. I accidentally typed
"POS solder" the first time, must have been one of those Freudian slips.
73
Roger (K8RI)
>
> Duh.
>
> 73, Bill W6WRT
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