On Tue, January 19, 2016 18:36, John R Pierce wrote:
> On 1/19/2016 3:29 PM, J Martin Rushton wrote:
>> I suspect that the gold layer on edge connectors 30-odd years ago
>> was
>> a lot thicker than on modern cards. We are talking contacts on 0.1"
>> spacing not some modern 1/10 of a knat's whisker. (Off topic) I
>> also
>> remember seeing engineers determine which memory chip was at fault
>> and
>> replacing the chip using a soldering iron. Try that on a DIMM!
>
> indeed, I pretty much quit doing component level electronics when
> everything went to surface mount.
>
>
Kids these days! I remember taking the vacuum tubes to the testing
centre in the corner drug-store to see which ones need replacing.
Apologies to the four Yorkshiremen.
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