Hello all,
I am trying to power an Atari 2600 video computer system and an audio amplifier from the same 9 volt wall wart. I've applied a stereo modification to the 2600 and mounted the amplifier and speakers from a Sony SRS-48 powered speaker system in the Atari case. The Atari came with a 300ma supply and the Sony had a 600ma supply, both 9 volt. I'm using a 9V 1 amp wall wart but if I power both from the same supply, I get a loud hum. I'm assuming that this is a ground loop. If I power them from separate supplies, I don't get any hum. Is there a simple cure for this or should I just mount another power connector in the case and use 2 wall warts? Thanks a lot.
Ralph