Electronics > Beginners
a kind of diode?
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nickeevblog10:
Having not tested the ferrites without cleaning the lads so readings are unaffected b dirty leads, would replacing the ferrites with a larger ferrite be as effective as the same size ferrite?
 I just thought to ask. I just looked at Dave Turners recent post about ferrite beads and thought it interesting to see more information about the use of ferrites in circuits on pcb boards, and before cleaning the leads on the ferrites I wastesting I had thouight to replace these two on this board andcould only find larger ferrites overall by about 2mm.
xavier60:
Another option is to replace the wire. That is if it has been glued into the bead.
 Make sure that the old wire is straight and burr free.
While holding the wire with pliers, use your iron to apply fresh solder to the wire near the bead for good heat transfer to melt the glue then slide the bead off with the tip. Don't use pliers on the bead, it will break.
 The best option is to put the beads back as they are. There is nothing wrong with them.
nickeevblog10:
After a gentle scraping with a copper wire brush and retesting the readings are much more stable. There is no more erratic fluctuations in the readings.
So these two will be going back on to the board and now I am going to remove and test the black square black 3 pin components surrounding the two ferrites.
I think there is 5 there and not sure what kind of components they are.
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