Electronics > Beginners
Naked ground plane PCB (what's the proper name)
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free_electron:

--- Quote from: eb4fbz on May 26, 2018, 03:51:23 pm --- fact that metalized vias didn't exist in those days
--- End quote ---

Check your 'facts'... they've been around since before ww-ii ...

this is a simply phenolic paper board. the holes are punched , not drilled. this process is not usable for plating via's.
dirt cheap board.
13hm13:
No takers on the riddle?

Read the riddle query carefully and, possibly, refer to the Wiki article on VIAs  ;)
eb4fbz:

--- Quote from: 13hm13 on May 27, 2018, 04:07:14 pm ---If a wire (or "connector") goes thru a hole in the PCB, at strategic positions, to that Cu plane on the component side, isn't that a "vertical interconnect access" ... or just  a "jumper"?

BTW: a riddle for those playing along at home:
That whole (stuffed) Philips board may contain MANY, MANY vias of the kind everyone can agree upon. Where are they?

--- End quote ---

I call them jumpers instead of vias because it's what they are: a jumper with a solder blob in the center at the ground plane side.

If they were wires or rivlets soldered at both sides of the PCB, like a homemade via, i would have called them vias.
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