[volt-nuts] low emf solder

[Poul-Henning Kamp]

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In message <CANX10hANKPjM3DKg8cEHSZcxLQC43pw0wpHkZHhdr6FENnESjA at mail.gmail.com>, "Dr. David K
irkby (Kirkby Microwave Ltd)" writes:
>On 28 Oct 2016 15:25, "Juris L" <juris.l at gmail.com> wrote:
>>
>> Found reference to optimal emf solder composition cadmium/tin alloy
>> (70 %/30 %) in JJ array measurement article page 12.
>
>I wonder how practical it is to weld test leads, so there's no solder or
>thermal EMF.
>
>I know that this will sound crazy, and probably is, but could one weld
>components to a PCB?

The very first TTL ICs were not soldered but spot-welded to the PCB, we
have some of them in a RC4000 computer in datamuseum.dk and also the
people who designed and built the computer.

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