PCB source

[ecat]

Use whatever you have to hand and bulk up the tracks with solder? This is a common enough trick seen in power supplies, amplifiers etc

EEVblog #317 - PCB Tinning Myth Busting - YouTube

[Jonathan]

Use whatever you have to hand and bulk up the tracks with solder?

That helps a little, but the resistivity of solder is substantially greater than copper, which I why I suggest soldering copper wire on to the board since that will make a much bigger difference.

[ecat]

Use whatever you have to hand and bulk up the tracks with solder?

That helps a little, but the resistivity of solder is substantially greater than copper, which I why I suggest soldering copper wire on to the board since that will make a much bigger difference.

Time between posts, 3 minutes.
Duration of video, 15 minutes.
Conclusion of video: A 50% reduction in the resistance of a 1oz copper track, see video for dimensions, is easily achieved.

Is this good enough for m.marino's application? I have no idea.

[Jonathan]

Time between posts, 3 minutes.
Duration of video, 15 minutes.

No need to spend 15 mins watching a video which just shows something that can be calculated in well under 3 mins.

Conclusion of video: A 50% reduction in the resistance of a 1oz copper track, see video for dimensions, is easily achieved.

Is this good enough for m.marino's application? I have no idea.

He can only find 1oz, but needs 2oz which implies the resistance needs to be halved. Since this is for a power supply space is not likely to be an issue, so doubling the trace width is the easiest option.

I should mention that in a demanding application where the current fluctuates a lot it's not sensible to add copper wire to the track since it expands at a different rate with changes in temperature compared to the solder, so it can cause cracks over time. A better way would be to solder a thick jumper wire. Wire is cheaper than solder...