What are the leads on components made of these days?
Used to be tinned copper wire ,but some seem to be iron or another alloy ?
Barry Wilkins
Used to be tinned copper wire ,but some seem to be iron or another alloy ?
Barry Wilkins
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Re: component leads
I took a magnet to my spare parts kit and found that most of my capacitors have ferromagnetic leads. Most of my resistors have non-ferromagnetic leads.
I suspect that since capacitors tend to be quite a bit more weighty than a resistor, the iron based leads provide mechanical strength.
But this sort of contradicts with my next experiment, onto my semiconductor pile... here it's a mixed bag...
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Re: component leads
I think it depends how old the components are some of my resistors are about 100 years old and are copper ,ones I bought recently are definitely not all copper .The wire is much thinner.Comment
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Re: component leads
tin endcaps and tinplate on the wires.Comment
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Hi I'm newbie when it comes to electronics repair. My copper pad where my diode sticks has peeled off what is the most efficient way to make the copper pad stick to the board? epoxy? ink mask? I want to hear your suggestions -
I currently have a customer's vintage fan on the work bench to repair.
It uses an induction motor with 4 poles. One of the poles is open.
I couldn't find the break so i cut off the original wire.
I have measured the other poles and the resistance is about 28 ohms per pole and I measured the diameter of the wire with my digital calipers and it is 0.35mm in diameter.
I need to work out how much 0.35mm diameter enamelled copper wire i need to order for it to be 28 ohms. I have used this calculator and it says i need 160.35 metres.
The enamelled copper... -
Hi there,
Recently I bought broken Bowers & Wilkins PX7 S2, the problem with them is that battery discharges on its own even with headphones turned off. It is a quite common issue with this model and even with model higher PX8.
With help of thermal camera I found out that there is one IC that is hot even with headphones turned off. To check if I'm correct I bought another PX7 S2 working one and replaced small charging board with this IC and problem solved, battery no more drains on its own. After changing board back to original problem returned so I'm 100% sure problem...05-30-2025, 01:11 PM -
OAUD Yamaha HS8S Audio one output only.
I have pulled the output board. Output txsistors are ok (only 2 main output). Everything measures the same on each side. Customer did not bring in speakers so I cannot go too deep. I did notice a greenish tint on the tip of the solder joints that connect to the COPPER output connectors. All 6 have a greenish tint at the tip - each side has 3 pins each. Anyone else have copper speaker output pins that corrode at the place on the PCB where they are soldered? I will try to add a photo. Thanks. -
Hello all - I was working on replacing the HDMI port on a PS5. After I removed the port and cleaned up the area, I noticed the copper appears discolored compared to the rest of the copper where the flux did not touch. The flux I was using is Chip Quik SMD291. I have attached an image. Does anybody know what causes this?
Thank you!
KB...
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