Author Topic: Testing repaired PCB tracks for current carrying capacity  (Read 427 times)

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Offline ThermallyFrigidTopic starter

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Testing repaired PCB tracks for current carrying capacity
« on: September 04, 2022, 03:54:51 pm »
Hello,
I do a fair amount of PCB repair and while most of the time the repairs are successful, I never have tested the tracks or vias I've repair for their actual current handling characteristics.

I'm wondering if I should and if so, how you do this for individual vias and repaired tracks.

Thanks
 

Offline m k

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Re: Testing repaired PCB tracks for current carrying capacity
« Reply #1 on: September 10, 2022, 03:35:00 pm »
I've also done some.

You should do the repair so that there are no doubts.
We used flatted wires that were equally wide.
Then thickness of the repair is always more than original.

Flattening is obviously possible only up to a certain width.
After that wires were left round, same when flattening was not suitable.

But since that was pro stuff very wide situations didn't happen very often.
Those were usually doomed and scrapped.

High frequency is another thing.
There you must start thinking how the correction affects the signal path.
General rule was to follow original route.
Advance-Aneng-Appa-AVO-Beckman-Data Tech-Fluke-General Radio-H. W. Sullivan-Heathkit-HP-Kaise-Kyoritsu-Leeds & Northrup-Mastech-REO-Simpson-Sinclair-Tektronix-Tokyo Rikosha-Triplett-YFE
(plus lesser brands from the work shop of the world)
 
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