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Could anyone help me identify what component this is? It is the white component with a black stripe.

What ever it is, it appears to be a open circuit. I couldn't measure any resistance (or capacitance). One pin of the connection has DC voltage while the second pin has 0 DC voltage.

(Also the backside of the component is plain white, not sure if it helps but just in case)

Thank you in advance

enter image description here

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  • \$\begingroup\$ That is very odd indeed. There are no reference designators either making it harder to interpret. If I had to guess, it's just a simple wire. \$\endgroup\$ – KingDuken Jan 8 at 0:06
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    \$\begingroup\$ What is the function of the board? \$\endgroup\$ – Kevin White Jan 8 at 0:30
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    \$\begingroup\$ I'm wondering if it is (or was) a fuse. There looks to be back-to-back diodes or similar in series with it. Is it part of something like a voltmeter that's frequently subjected to abuse? \$\endgroup\$ – Spehro Pefhany Jan 8 at 1:45
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    \$\begingroup\$ How exotic is this preamplifier? Is it possible it's a very high value resistor (eg. 1G)? If you have a meter with conductivity function you may be able to measure it. \$\endgroup\$ – Spehro Pefhany Jan 8 at 19:26
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    \$\begingroup\$ @xydn - As highlighted in an earlier comment from Spehro, surrounding components might give us some clues. Personally, I want to see added to the question: (a) more photos of the PCB, showing the whole PCB from different angles, with any known info annotated (e.g. which connectors lead to power, signals etc.); (b) any reverse-engineering of the schematic done so far; (c) more context e.g. if you're trying to repair the pre-amp, perhaps the component has changed value \$\endgroup\$ – SamGibson Jan 8 at 21:24
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Hmm, my best guess is, that this is a some base material (white) with a conductive ink (black) drawn on top of it. I also used the fact, that the black part covers the soldering on both ends (to ensure connection). If this is true, the resistance between the two pads should be less than 1 Ohm. Can you verify this with an ohmmeter?

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  • \$\begingroup\$ It could be a carbon(?) printed resistor of some sort, but the resistance could be nearly arbitrary IMO, not at all necessarily less than 1 Ohm. \$\endgroup\$ – Richard the Spacecat Jan 13 at 12:36
  • \$\begingroup\$ As I said, with the ohmmeter it seem to be open circuit. Can't obtain any resistance value. Since it is open circuit, it can not be a resistor less than 1 Ohm. \$\endgroup\$ – xydn Jan 16 at 20:51
  • \$\begingroup\$ Yes, got you on this. As @Richard the Space cat correctly added, it might be an arbitrary resistance \$\endgroup\$ – letsfetz Jan 16 at 21:58

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