1994 Mazda Protege Battery wont stay charged

Electrical problem
1994 Mazda Protege 4 cyl Manual

I have changed the battery as well as the alternator and the battery still doesnt stay charged. It seemed to be happening mostly at night so I took out the fuses for the radio and clock and only drove during the day as to not use the headlights. That seemed to work fine for a couple of days but now the battery doesnt stay charged during the day either. I can get the car jumped but if I let it sit to charge the battery slowly dies, also if I rev to high rpms the battery light goes off? I have already spent a lot of money trying to figure this out and dont have much left, please help!