how conductive is solder?

[Needler56]

if i have a power wire open in the middle, tinned, and i solder another wire (that is also tinned) onto it, will the power flow freely? cause now its solder on solder in a sense..

[TBone77]

if i have a power wire open in the middle, tinned, and i solder another wire (that is also tinned) onto it, will the power flow freely? cause now its solder on solder in a sense..

That's pretty much how it's intended to work.

A solder joint does have some resistance, but when done properly, it's quite negligable and nothing to worry about.

[4W Guy]

if i have a power wire open in the middle, tinned, and i solder another wire (that is also tinned) onto it, will the power flow freely? cause now its solder on solder in a sense..

This is one of the ways a three wire ESC setup is done. So I would say that it is good.

[tadium54]

remember tho- solder is like a conductive glue. the stronger the joint is, the less resistance will be(eg solder vs ca glue, the bond with the solder is so much stronger and conducts better)

[Grizzbob]

Correct, the solder is not the key to a good electrical connection, the materials being connected is. That's why it's important to do the soldering with as little solder as you can, so you can maximize the amount of the actual materials touching each other(which minimizes how much resistance the solder might add to the joint)..... :cool:

[baih]

a couple of years ago i was wondering the same thing. i took about 5 different brands of solder and solder joints together to measure resistance in the joint with a meter. this may be the wrong way to test but the difference with a ohm meter was minimal.
i just use a good quality solder.
i only use kesters "44" solder. for rc i have found it to work great. it has flux already in the solder.
you can find it a fry's electronics.