[Boatanchors] Desoldering Components
David C. Hallam
dhallam at knology.net
Thu May 9 15:49:10 EDT 2013
I certainly have considered for those tie points where the hole is not
completely filled with wire just cutting the wires of the old components
as close as possible and heating just enough to push a new component's
wire through. In the past I have used the quigs or Quikettes as Sprague
called them. I just can't bring myself to like the looks of them, just
like the orange drop capacitors.
Resistors can generally be tested without loosening an end. Capacitors
are another matter, although the manual I have with my old Solar
capacitor tester gives some kind of a qualitative in-circuit test for
capacitors. I gather this test requires some kind of test leads that I
don't have for the meter. I have never been able to get any information
about them.
I have read that TEK did some testing the reliability of solder joints
and found that wrapping the wire around the lug did not make any
improvement over just putting the wire through the tie lug hole and
soldering.
David
KW4DH
On 5/9/2013 3:20 PM, Jim Haynes wrote:
> Another possibility is to ignore the old dictum that the joint must be
> mechanically sound before the solder is applied. Which is the reason
> component leads are wrapped around the terminal lugs in the first place.
> Just lay the new component lead on the terminal lug while applying the
> soldering iron, after applying a little fresh solder to the new component
> leads. If the component is not massive and subject to vibration the
> joint will probably last a lifetime.
>
> Jim W6JVE
>
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