time-nuts-boun...@febo.com wrote on 01/20/2009 04:32:15 PM: > Bruce Griffiths skrev: > > The relatively low thermal conductivity of the steel can will help > > considerably in avoiding thermal damage if the heat is > applied to the joint. > > If the can were copper it would be much more difficult to avoid thermal > > damage. > > When I needed to have a McCoy oscillator can opened my trusty good old > friend Sten did the usual trick of pre-heating the can and then when > applying heat to the solder the thermal difference is lower and hence the > heat-flow away from the joint. Didn't take much time and I think the > oscillator is 100% intact. > > Pre-heating and hot air are his main tools for tricky soldering jobs. He
> has low fatality rate on problems like that. This is why we let him do > that kind of stuff at work. I imagine that Sten works *very* fast. I've found that when soldering thermally sensitive things like small coil bobbins made of nylon that a high temperature and relatively large iron is best - the terminals come up to temperature almost instantly, and it's all over before the heat can spread and melt the bobbin. Hot air has the advantage over a flame that overtemperature is less likely with hot air. Joe _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.