[time-nuts] Wenzel Oscillator Repair
Magnus Danielson
magnus at rubidium.dyndns.org
Wed Jan 21 21:12:03 UTC 2009
Joe,
>> The pre-heating trick actually makes the big soldering iron rest most of
>
>> the time...
>>
>> We have boards with so much ground/power grids that it is really a
>> headache to do without pre-heating, which is similar to the iron case
>> soldering problem.
>>
>> So, doing it this way makes it go fast.
>
> I think we are talking about different things. For getting chips off a
> big multilayer board, preheat plus hot air is a standard way to go, but we
> are talking about how to unsolder a steel can with foam insulation within.
> Slow heating to near soldering temperature is likely to yield a heap of
> goo.
Actually no, the physics behind it does not really change and he also
did unsolder the endcap of a steel can for me in this fashion. No goo
inside as a result. Worked very well. I expect to be able to use it once
I am done inside.
> The point of the torch method is to heat the can's solder seam up *fast*,
> so the solder melts before the foam.
Sure. But pre-heating and hot-air works too.
Cheers,
Magnus
More information about the time-nuts
mailing list