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| Naked ground plane PCB (what's the proper name) |
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| 13hm13:
What's the proper name (if any) for the following type of PCB with that naked copper shield. It's from a late 1980s Philips CD player: |
| eb4fbz:
Ground plane? Maybe you are confused because of the fact that metalized vias didn't exist in those days, so ground connections were done using wire jumpers. |
| Kalvin:
--- Quote from: eb4fbz on May 26, 2018, 03:51:23 pm ---Ground plane? Maybe you are confused because of the fact that metalized vias didn't exist in those days, so ground connections are done using wire bridges. --- End quote --- :-DD Well, the better explanation is cost optimization. Typically consumer electronic devices used similar method of using jumper wires in order to avoid having a through-plated PCBs. |
| 13hm13:
--- Quote from: eb4fbz on May 26, 2018, 03:51:23 pm ---Ground plane? Maybe you are confused because of the fact that metalized vias didn't exist in those days, so ground connections were done using wire jumpers. --- End quote --- There are SMDs on the other side of that PCB, so there are vias. The copper plane your see on the component side is (0v, common), and both digital and analog devices are common (grounded) to it. Schematics for this 1988 device are here if anyone is curious: https://www.hifiengine.com/manual_library/philips/cd473.shtml BTW: The query remains unanswered: if this style of "naked ground plane" is not a ground plane, what's the proper name. |
| Alex Eisenhut:
--- Quote from: eb4fbz on May 26, 2018, 03:51:23 pm ---Ground plane? Maybe you are confused because of the fact that metalized vias didn't exist in those days, so ground connections were done using wire jumpers. --- End quote --- WTF??? :-// |
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