Tantalum Bead on Intel NIC Value? \ VOGONS

Tantalum Bead on Intel NIC Value?

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First post, by Jackal1983

Posted on 2022-03-09, 18:23

Jackal1983 Offline

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Noticed a damaged tantalum cap on a Intel 16 bit ISA NIC I got. It seems to be tied to the shield of the 10Base2 coax connector: I looked up the Philips chip that handles that capability but the datasheet doesn't mention what value the cap should be (unlike the 10Base2 chip on the 3com NIC I have). The markings on the cap don't match any cap value convention I've see. Any ideas of what value I need to get?

Reply 1 of 5, by Doornkaat

Posted on 2022-03-09, 18:30

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Are you sure this is defective?
I have seen a similar cleanly cut capacitor(?) on a whole bunch of BNC NICs.

Edit: Apparently it's a (spark) gap capacitor?

Reply 2 of 5, by weedeewee

Posted on 2022-03-09, 19:05

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Doornkaat wrote on 2022-03-09, 18:30:

Are you sure this is defective?
I have seen a similar cleanly cut capacitor(?) on a whole bunch of BNC NICs.

Edit: Apparently it's a (spark) gap capacitor?

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Reply 3 of 5, by Jackal1983

Posted on 2022-03-09, 19:08

Jackal1983 Offline

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Doornkaat wrote on 2022-03-09, 18:30:

Are you sure this is defective?
I have seen a similar cleanly cut capacitor(?) on a whole bunch of BNC NICs.

Edit: Apparently it's a (spark) gap capacitor?

Huh, learn something new every day. Yeah, I guess that's what it is. I guess the 3com NIC having a normal cap threw me off.

Reply 4 of 5, by Doornkaat

Posted on 2022-03-09, 19:10

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It's not like I wasn't thrown off when first seeing such a component.😅 Upon closer inspection it just looked so intentional I never worried about it too much. Now I've had a reason to look it up. 😃👌

Reply 5 of 5, by Sphere478

Posted on 2022-03-10, 06:51

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That’s wild, learn something new every day. Yeah that sure as heck looks designed to be that way. Good job guys figuring this out.

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