Transformer hum?

Try using cheater plugs on all units that hum.

Cheater plugs are for ground loop hums, which you hear through the speakers. Cheater plugs won't solve your problem if you have mechanical hum.

Your transformers are humming inside the gear correct (Mechanical hum)??
One term used to describe the cause of the hum is "DC Offset".

One potential pitfall of issolation transformers or regenerators, is while they will solve the system mechanical hum, it is possible they will hum themselves since they are getting the same bad power the gear was getting.

Where do you find cheater plugs and what are they?

Thanks.

Cheater plugs are an adapter so a 3 prong AC plug can fit in a 2 prong socket (one without the ground). They cost about 50 cents each at any hardware store, Lowes, Home Depot, etc.

Audiophiles use them to "lift"/remove the AC ground from a component. They will work for "ground loop" hum, which is a low hum sound you will hear coming out of your speakers. They will NOT help at all with a mechanical transformer hum.

Today, I tried using cheater plugs, but it didn't help.
I've been plugging and unplugging, isolating, trying
different combos, etc. etc. Unless the cheater plugs
need time to work, need to burn in or something, I can say that cheater plugs are not the answer. I do not have dimmers on this circuit. I have tried disconnecting
the TV cable. Didn't help. I don't know if I have mechanical hum, or not. It seems like a weird coincidence that I have 5 items in my system that
use transformers and four of them hum. I have florescent lights on a completely different circuit and when they are on, the humming is much louder. But when I turn off all the lights in the house, I still hear
a light humming coming from my components.
To add another wrinkle, one of my Levinson 436's
hums, but the other is stone silent. I have heard that
a ground loop hum can be identified by whether or
not you can you can hear it in the speakers. I can
hear it in one speaker, but not the other.

I suspect the electrical system, but I don't know
enough about it to know if I am on the right track,
or not. I was hoping the AC conditioner would solve
all AC problems, but it seems susceptible to whatever
is affecting the other components. Or, coincidence or not, I have four components that just happen to have
mechanical hum.

Does this information help?

Anyone?