Noise / EMI Filter - trying to understand

Liteyear98

Active member
Joined
Jan 10, 2010
Messages
1,203
Reaction score
6
Location
Nogales, Arizona
I understand the task and purpose of a power filter. I was just curious if something like this (Pic Below) would eliminate the need for a power filter mounted in the circuit.

My assumption is that it would, but what size would a normal arcade game require? I have seen sizes from 1A to 16A. I just dont know what size to use for a normal arcade game like Ms. Pacman.

Suggestions please?
 

Attachments

  • 1951633.jpg
    1951633.jpg
    3.6 KB · Views: 18
Yes. This would work. It's intended for things like computers, which use that kind of IEC power socket and have a convenient place to mount it - it saves space. But in an arcade game, there isn't a good place to mount a device like that - it would be a lot less convenient than the conventional kind. It's intended for panel mounting, whereas in a game, you need something you can screw to a piece of wood.

But you just need one that will handle the load of the game. Just look and see how big the main AC fuse in the game is (probably around 3A), and get one at least that big, or bigger.

-Ian
 
Thanks

I was thinking it would be deep enough to go through the wood body of the game and eliminate running a cord through a gap / hole. An appropriate hole would have to be made, but that would be too easy.

I never thought to look at fuses - that makes it easy.

Thanks for the good Intel.
 
I was thinking it would be deep enough to go through the wood body of the game and eliminate running a cord through a gap / hole. An appropriate hole would have to be made, but that would be too easy.

It might fit, but I am going to say that it's a bad idea. The problem with putting an IEC receptacle on the back of an arcade game is that, unless it's recessed, the cord is going to be very pinched against the wall if you push the game back. You'll have this two inches of plug and strain relief that will get destroyed, and push pretty hard on your mounted socket. Later games actually use a PC style supply, and thus have this type of socket on the back. They're usually broken.

The advantage of the simple cord running through the notch in the door is that you can tuck the cord inside when you move the game, and it won't interfere with sliding it against a wall. It's much simpler, and less prone to breaking. If you do want to use that style of socket/filter (say, you've got a bunch, and like the idea of a replaceable PC cord), I'd mount it to the inside bottom of the game, plug the cord in, and run it out through the notch in the back.

-Ian
 
More good info

I never thought of that either, I must be getting old or not thinking. I have a Neo Geo with two of these and if I remember correctly one of them is damaged from being pressed against the wall. I know there are some 90 degree power cords out there, but thats still a lot sticking out the back and pressing against the wall.

Thanks for your invaluable insight.
 
Bah... just get a 90 degree power cord.

When moving games, these cords unplug and won't get in the way. They also aren't flopping around inside the game tearing at wires and other components when moving cabinets. They can also be easily replaced when dogs/rats/mice/your nephew chews on them.
 
Back
Top Bottom