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Recommendations for 4mm banana sockets
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OM222O:
Hello
I was looking for some cheap banana sockets (binding posts) that can be directly attached a PCB which also acts as the front panel.(i.e. it doesn't require to solder more wires to the end of it which then connect it to the actual PCB)
The best ones I could find were these or very similar:
https://uk.rs-online.com/web/p/4-mm-test-plugs-sockets/1222783/


but it doesn't seem to be really intended for soldering. I'm not sure if the pressure from the nut is enough to make a good electrical connection (maybe I should get some spring washers too? idk).
There are some plugs which have the "solder" termination style but seem too flimsy and unreliable for long term use like these:


If you have recommendations on any cheap (less than 2$ a pop in 100+ quantity) please leave a link to them, thanks!
Andreas:
Hello,

not shure what you really want.
- normally you do not want to have the forces from plugging on a solder joint.
- you say "binding post" but show a 4 mm socket only (without possibility to connect a single wire).

4 mm sockets that are soldered into the PCB have normally a right angle so are not intended for a front panel:

https://www.conrad.de/de/cliff-fcr7350r-sicherheits-laborbuchse-buchse-gewinkelt-stift-o-4-mm-rot-1-st-419669.html

https://www.reichelt.de/leiterplattenbuchse-4-mm-rot-pb-4-rt-p76865.html?&trstct=pos_0

with best regards

Andreas


OM222O:
I'm not quite sure what the difference is between a binding post and a socket sorry. They look very familiar tho ... the only difference I could spot was having a metal plate that contacts the PCB in case of a binding post, which the sockets don't seem to have (please correct me on that), but cost twice or 3 times as much  :-//

I can't use horizontal connectors as they make it so much more difficult to use the product, especially when you have to switch them (I know I can design around that but I'd rather not). I'm just not sure how reliable a simple nut is ... I probably use the socket I linked + a washer and some medium strength loctite
Nusa:
What you see on most multimeters is a socket. The ONLY thing you can put in there is a banana plug.

What you see on all the better power supplies is a binding post. You can put a banana plug in the end, or a wire around or through the screw-down post.

Realize anything already soldered to a PCB can't be later attached to a solid panel with back-side nuts. It's physically impossible.

Something like this (http://www.caltestelectronics.com/ctitem/161-safety/CT3150) will work, but the PCB needs to be well supported on both sides of the sockets, since it can't be secured to the front panel itself
OM222O:
In that case a socket would be fine, it's just a simple diy device not a high end and fancy one. The socket *can* be soldered, you just have to place the nut and then solder it, but replacing it would become a nightmare in case it breaks ...
I read about washers and nord lock washers seem to be a decent choice (practically impossible to loosen as the pitch of washer is steeper than the thread of the screw, so it needs sufficient force to deform the washer first which will never happen during normal use).

Edit: I can actually buy self locking nuts for cheaper ... Just need to make sure they make good connection while tightening them.
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