I have had these for 25 to 30+ years and I never found out what they were.  Anyone out there able to enlighten me, please?

If this is the wrong forum I apologize but I could not find a general section.

They might just be zero ohm resistors.  Black = zero.  Try checking with your multimeter.

I believe MH is correct.  I googled 0 ohm resistors and got this photo.  I have never heard of them before.

Bill


Partial quote from Wiki:

"A zero-ohm link or zero-ohm resistor is a wire link used to connect traces on a printed circuit board that is packaged in the same physical package format as a resistor. This format allows it to be placed on the circuit board using the same automated equipment used to place other resistors, instead of requiring a separate machine to install a jumper or other wire.^[1] Zero-ohm resistors may be packaged like cylindrical resistors, or like surface-mount resistors."

Very interesting indeed.  I measured them years ago and saw a dead short and never touched them again until today.

Fascinating, and thanks for the help guys.

Hey, wait a minute.  I read the Wiki entry and got to thinking about it.  If they just used a piece of wire, that would add some resistance to the circuit, so they use these instead.  Does this mean that it has negative resistance such that when added to the wire used to make them equals 0?  Is there such a thing as negative resistance?

What I mean is, if you cut off the wire leads on these and measured the resistance on the thing with the stripe, would it be negative if it totaled zero with the leads?

In other words....how did they do this?


Bill