Electronics > Beginners

Component identification

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ArthurDent:
There are many problems here but the biggest problem is between the chair and the component trying to be identified. None of the information presented so far makes any sense and varies from one post to the next. The readings taken with a meter in diode mode are said to give voltage drops of about .2 volts which isn't likely with any diode made in 1976, or today. The nearly 4 uf readings in a package so small are also impossible. If these were bridge rectifiers they would likely have the 2 sine and the + and - symbol embossed on the part, not 1,2,3,4. The original poster says they have all sorts of equipment but hasn't been able to use any of it to figure out what the parts are despite numerous suggestions.

At this point I think a hammer might be the best way to figure what is inside.   

Jwillis:
Considering its age its not impossible that its a germanium bridge rectifier?Wouldn't that explain the low voltage drop?Can be lower than 0.3V Although I've not seen them in this type of package .Could explain why there are no data sheets.
Also the pins are not sequential 1-2-4-3 .Odds at the outside and evens at the inside.
Most definitely an oddity.Hammer time.

MK14:
At first I would probably have said a bridge rectifier. But it does not necessarily have the markings to be one, such as a polarity notch, +/-, etc.

Could be a 4 pin SIP, DC to DC converter.

That could explain the various "strange" component readings, as it would probably have a lot of passive components and a few semiconductors in it. It might also explain why it has 4 numbered pins on it.

Example:

Jelcke:
No useful output on any legs when feeding DC or AC.
I have used an axe to open this one up.

drussell:
I figured by the pin numbering that it was some kind of hybrid module like that but couldn't find any cross-reference with any of those numbers that might shed some light on what the configuration might be.

Now you know.  :)

Out of curiosity, what are the values of the individual components?

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