Quote:
Originally Posted by 350TSS
Why will it increase resistance ? because lead is a poorer conductor than copper?
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You can't beat copper as a conductor!
This chart shows the conductivity of various solders as a comparison with copper.
The first column shows solder conductivity between around 9% - 16% of copper, depending on its composition.
As a baseline, the standard resistivity of (annealed) copper is 1.7241 x 10-8 ohm-metre.
Whether the difference is worth worrying about is another question. You could always do a quick test - measure the resistance of a length of unsoldered wire then add some solder part way along its length and measure the resistance again.