Transformers in their general form have two legs per side (you will get a resistance between them if you need to check) for a minimum for four, any more tends to be when you have multiple output windings (in normal times might want 120V for normal and then 5V to just power some simple electronics). Most times you see transformers they are there to change voltage but here it is 1:1 which theoretically does nothing to the voltage, but will stop the induced noise by reasons described above. Short version there are three main components, though in this case one as you surmise.Ĭoils tend to refer to inductors which do get used to smooth out spikes but this is actually a transformer. Most usually look more at capacitors but if a ground loop isolator does the deed then can go in for that. But i don't know jack about electronics so i would be glad if someone that does could chime in a bit. ![]() Looking at the PCB it looks like some pins of these coils are either completely unused or, more likely, the PCB has at least three layers where those remaining traces are. The jacks wouldnt be needed if one were to mod it inside obviously so its down to those coils.īut that's about were my knowledge ends already. I've taken one apart to get a better understanding of how the components inside are arranged and how well they could actually fit and from what i can tell its just two of these little coils and the 3.5mm jacks. But having to constantly hold it in the hand at the same time with the GBA gets cumbersome and uncomfortable after a while so i was wondering if it was possible to fit one of those isolators into the GBA, I've certainly not seen anyone else do it before. And with it the noise is nearly gone, completely unnoticeable when ingame. That's why I always carry a ground loop noise isolator with my GBA. I can still hear the buzzing very clearly, especially through my headphones. The dehum dehiss kit already provides a sort of solutions to this problem but i think that isn't nearly good enough. ![]() I always play with headphones on and when playing my GBA I would always have a slight but noticeable buzzing sound that you all should be familiar with, especially if you did the amplifier modification.
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