compositor question

[ComputerHoarder]

these say Cxx next to them do these have pms too? (sorry for the bad pic my room is dark) they came off a old telephone modem pci card the blueish one is actually blue and silver

 

[butcher]

Those look like capacitors, hard to see picture, the bottom can type is an electrolytic capacitor, rolled aluminum foil and a paste electrolyte in a metal can.

There were some older capacitors that contained silver, like the dog bone type (hard brown shell), and there were old electrolytic type gray with a red stripe (those were always going bad in circuits).

I am not sure whether those you have any silver or not (at this point I doubt they do), but you could test for silver in them, to test I would crush cover in HNO3 in a test tube add a little HCL or salt and watch for white silver chloride to form (cloudy liquid or precipitant).

 

[ComputerHoarder]

haha i misspelled it so embarrassing