Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: Sonny_Jim_Pin on June 05, 2022, 05:46:41 am
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The chassis my cabinet has at the moment has no degaussing circuitry, I've got the wiring around the tube and nothing else. I've tried using a handheld degausser but I've still got spots on the screen.
Is it possible to create a 'manual' degausser separate from the chassis? Any ideas what components it uses?
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"Manual degausser" functions in original arcade cabs are mostly very simple. It consists of a button (appropriately AC voltage rated) with a spring inside, so that the circuit is only closed while the button remains pressed. Nothing more complicated than that.
Note that degaussing coils suck a lot of power and get hot fast, so should be operated for no more than a few (2-3) seconds, and not operated repeatedly over a short time (let it cool down). If you want to run with a manual degauss function, probably also a good idea to think about putting a fuse (and a line filter) on the AC input to your cab.
For TVs that degauss automatically on power-up, they typically switch off power to the coil using a thermistor (or some other temperature-controlled method).
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if you have a PC CRT, put it face to face with your arcade monitor and hit the degauss button.
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"Manual degausser" functions in original arcade cabs are mostly very simple. It consists of a button (appropriately AC voltage rated) with a spring inside, so that the circuit is only closed while the button remains pressed. Nothing more complicated than that.
That's what I figured after looking at a few chassis schematics. I did read somewhere that a capacitor is required to provide some sort of 'ringing', but I'll give it a go with an appropriately rated momentary button.
Thanks!
EDIT: Wired up a quick degauss test using a relay to switch the 110V to the degaussing coil. It looks like I need a suitable PTC for it to 'decay' properly, got one on order, will update when it turns up