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Message ID: 768     Entry time: Fri Dec 23 18:39:10 2011
Author: Frank 
Type: Notes 
Category: RefCav 
Subject: radiative heater 

Situation: The heater wire should not go all the way to the vacuum feedthrough connector. Instead the connection from the heater to the connector should be made with some low conductivity material to only add heat where we want it.

So i tried to solder copper wires to the end of the Nichrome wire and failed. Whatever people suggest on the web does not work properly. i tried 6 different kind of tin with different fluxes, 3 separate fluxes incl rosin and acid flux for brazing steel. Oxidized, scratched, etched the surface - nothing worked. you can get a blob of tin at the end but not a clean solder joint.

will go for crimped connections unless someone has an idea....

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