Mcintosh 250 Transformer Hum Normal

I had not noticed till today as it was very quiet here, I notice a slight hun from the unit, Nothing from the speakers.

Again I do not recall it but I had never had it on in a very quiet room and you have to be very very close (like right next to it) it could be that i just have very good hearing in that frequency range ;-)

If this is not normal what could cause it? The unit does not run warm and sounds great.
  • Just from a Google search

  • a lamination, winding or clamping screw in the transformer has come loose. Screws can be tightened, and you could maybe re-dip the transformer in magic lacquer.

  • the quiescent load on the transformer has increased, making it hum more (e.g. capacitor going bad, diode failing)

There are other things that can cause transformer hum, though. Within the amplifier, it may be that the transformer is running at a higher load than usual due to leaky caps or messed up biasing on the output transistors. Outside the amp, if the mains has a moderate DC bias or excessive noise, you can get hum and chatter. /u/kasonc, have you changed any heavy equipment, light dimmers, or wiring in your home recently?

Another solution is do to what this guy did where he whined that no one was willing to help him that McIntosh did not reach out to help him that contributors, posters, and users of this forum did not help him and so he was prepared to do nothing but decide to burn his amplifier because it was his right to do so it was under warantee but he was not willing to pay the shipping cost to return it to the factory!
Fyi I never had buzzing sound.

Its a annoying hum,  I live in a nice area in Chicago, its all residential homes no commercial close by.

Com Ed ran new lines not too long ago and as mentioned our home has fresh wiring from the pole in.
Have, 3 pc here, many tvs as well as audio equipment.

If there was strange stuff going on with the power  Im shure as shixx something else would of acted up by now.

Just my 2cents,  Im done