Dish receiver causes speaker hum with three prong plug?

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crippledchicken

crippledchicken

Member
Joined 2003
#1
My Parasound a23 2 channel stereo power amp comes with a three prong plug. when using that type plug, I get speaker hum with Dish receiver hooked up feeding audio to preamp but not when it's not hooked up it, also has a three prong plug. I've been using two prong with power amp to defeat the speaker hum. I don't like using the two prong and loosing the grounding prong. I've been told on another forum that it was a common problem with Dish receiver use through stereo. Also, they mentioned the use of a ground loop isolator would solve the hum problem so I could use the factory 3 pronged plug that came with the power amp. Anyone familiar with the ground loop isolator they speak of? Through unhooking things, I for sure isolated the problem to be because of the Dish receiver which, was stated to be a common problem. I'd sure appreciate all input and, maybe some links to the type ground loop isolator others were referring to. Thank You! 🙂
 
#4
No, you can't stick a coax ground loop isolator into the satellite line, the whole reason satellite receivers are prone to ground loops is because they are usually powering the dish electronics.

Are the satellite receiver and amp plugged into the same power outlet?
 
#8
If that's the case it's likely because the ground loop is being caused by the satellite coax being grounded both at the receiver and probably the main panel for lightning protection.
Does the satellite receiver have a digital output, either RCA or fibre?
 
#12
Well, it's bad to get old 😀 I hooked my factory three prong power cable and everything was just fine. I'd forgot to try the power cord after, replacing my Adcom Preamp with the Parasound P5 evidently, it was something to do with the old preamp sorry folks for my lack of thinking! 😱
 
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