[volt-nuts] low emf solder

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Oct 29 03:04:22 EDT 2016

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.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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