Hiss louder after electrician...help (1 Viewer)

[Levesque]

Wow, what an experience!! Short story. Finally went separate, got a hiss. Unplug everything except speakers, got a hiss, hear it from only 3-4 inches. Invite a friend, electrician. We redo all the grounding at the servive panel, 2 new rods (old one was under the house...), reground sat-dish and coax to this new rod (was grounded fast and dirty on a light fixture lol),all the house grounds redirected there (so no loop), 20A dedicated circuit with high magnetic breaker, cable-loop-ground isolater from RatShack from the coax feed...and... the hiss from tweeters is like 10 times louder, even ear it from my main listening position now, and spreading into a hum from the woofers (was not there before) !!! What's happening!!! Help me...

By the way, my electrician friend told me a funny story. Farmers are fighting, like us (lol) against ground loop. Cows don't drink if they feel a ground "current" in their watering place...Talk about a double-blind test!! Humans cannot feel this current, but cows feel it...No audiophile anymore, but cowdiophile...

I demand equality with cows. No more hiss or ground loop for me. Help me.

 

[Earl Simpson]

Ok! I will assume that you have tried various grounding wire combinations between the equipment????? You know= everything hooked up and take off various grounding wires to see how it effects the hiss and hum.

Also, are you using a back up power supply or surge????? If so, try direct.
Also! Did you split the grounding conductor and grounded conductor on you isolated circuit? 3 distinct wires to the main the panel/not the sub panel and do a separate ground (30 ' deep) for the isolated circuit at least 20 feet from your other ground rods. Be careful! You could make your house an attractive place for lightning to find a home. Most grounding grids need to be away from the house and designed to funnel excess electrons way from the house. That is how I did mine.

And if all that fails, un-create your isolated circuit. You could be picking up a signal off of nearby wires or your ground is insufficient.