Humming inside the TT

Could be the fan. Mine at low speed, when lightly loaded, sounds like a hum to me.

rrupert wrote:
The transformers in converters can have an AC hum.

SoundGuy wrote:
Converters for many years now have been all solid state and don't have any transformers in them.

wnjj wrote:
Solid state doesn't necessarily mean there are no transformers.

Only an engineer would care :R - my point is that while converters used in RVs many years ago used to have heavy transformers the current crop built in the last 20 yrs do not. No transformer = no transformer hum, so that's not the OP's problem. ;)

SoundGuy wrote:

rrupert wrote:
The transformers in converters can have an AC hum. The plates can vibrate from the magnetism generated by the wire coil. It sounds like the humming that comes from florescent lights.

Converters for many years now have been all solid state and don't have any transformers in them.

The answer as to why the converter hums is obvious - it doesn't know the words. :p

Lol, that made my day!

SoundGuy wrote:

rrupert wrote:
The transformers in converters can have an AC hum. The plates can vibrate from the magnetism generated by the wire coil. It sounds like the humming that comes from florescent lights.

Converters for many years now have been all solid state and don't have any transformers in them.

The answer as to why the converter hums is obvious - it doesn't know the words. :p

Solid state doesn't necessarily mean there are no transformers. In fact that usually refers to not having mechanical devices like relays. Switching power supplies have at least two transformers: 1 to reduce the incoming line voltage down to lower levels before converting to DC and another that is used in the switching. PD's patent has the word "transformer" 93 times. https://patents.google.com/patent/US7782002

That initial step-down transformer will be switching at the 60Hz line frequency and could hum some, though probably not loud like a large high voltage circuit breaker panel.

Make sure your battery is'nt on the way out.

rrupert wrote:
The transformers in converters can have an AC hum. The plates can vibrate from the magnetism generated by the wire coil. It sounds like the humming that comes from florescent lights.

Converters for many years now have been all solid state and don't have any transformers in them.

The answer as to why the converter hums is obvious - it doesn't know the words. :p

Do you have an Automatic Transfer Switch that switches between Generator and Shore power? The big relays in the ATS will sometimes hum. That is fairly normal for them. I can hear mine if I have the door to the electrical bay open, but can't hear them in the MH even though the electrical bay is directly below the bedroom.

Did your wife recently take up yoga?

Some of the things mentioned of it could be something as simple as a capacitor where voltage applied is at a frequency that cause a piezoelectric hum or bussing sound. That could come from any electronic device that has a power supply in it.

Do you have a power brick for something like a laptop computer? My Goal Zero Yeti 150 has one (now two) like that and they buzz a bit once the unit is topped off. When I called them and complained about the first, I insisted that solid-state electronics like that shouldn't buzz, so they sent me another.

A little online searching found multiple reports of what I experience with mine.

Best regards,
Chris

its mother hubbard and her family of mice .