Does anyone have experience with noise reduction ?

"It is grounded to Earth on a seperate rod from the house as a precaution from lighting strike"

If your ground rods are not tied together, you may have created a ground loop. The two different grounds will have slightly different potentials and will oscilate between each other causing the hum or ground loop.

You might try disconnecting the FM section of your set up and see if the hum goes away.

Dave

Hello Dave,
On many occassion I have removed the Lead from the antenna during lightning storms "just in case". I can still hear the noise and the lightning charges for that matter with it removed. All the equipment( generator etc , electrical panels boxes ,grounding buses and inverter)grounds are all tied together with bond wire as per installation and NEC requirements.The noise did not show till the inverter was installed and only occurs when it is inverting 48v. to 120v, on generator power it is not present. Buy the way the generator creates more noise from the moter running so it is more intrusive than the inverter interference.
John mentioned the MIT ISO-linQ.What are these?
The funny thing about this is one of the company engineers with Trace worked for Acoustic Research in the old days and I would think that it would be a money maker for Trace to have a solution.
As to noise on the home theater thier is usually alot of background noise in the soundtracks that it is not an issue.

Again Thanks for the replies.

I agree that the source of the noise is the inverter. And it's very hard to get rid of noise that comes from the source of the electrical power itself. I think the most direct way to kill it would be to use a balanced power unit such as Equi-Tech, ExactPower, or Balanced Power Technologies. Basically, they'll divide the single 120V 60~ into two 60V 60~ which are 180 deg. out of phase and
thus null out any line-bourne noise. Read up on it at any of their websites.

I realize this post is old but I thought I should respond anyway.I would check out a Porter Port Cryo Outlet.This may reduce your noise considerably.I'm not saying it may not totally eliminate it,But in my case in my home it dropped a great deal of noise out of my system.

My Scott tube reciever 240 b and my 222c do not produce the noise. My McIntosh solid state preamps do. It is in the transistor preamp sections that the noise is picked up .
My cheap Denon home theater receiver is quiet though so go figuire.