can you get a shaver socket that does not hum?

Section62

grumpy_codger said:

Section62 said:

teaselMay said:

grumpy_codger said:

teaselMay said:

...The mains in general hums at 50Hz.

100Hz            

No idea where you are if the mains is 100Hz

The hum from a transformer is typically double the mains frequency.  Though the totality of the subject of 'hum' is a lot more complicated than that.

What exactly is more complicated (in terms of doubling the frequency)?

"...the totality of the subject of 'hum'..."

Harmonics... for example.  Or the interaction between equipment, or with nearby ferous metals, for another.

teaselMay

Section62 said:

teaselMay said:

grumpy_codger said:

teaselMay said:

...The mains in general hums at 50Hz.

100Hz            

No idea where you are if the mains is 100Hz

The hum from a transformer is typically double the mains frequency.  Though the totality of the subject of 'hum' is a lot more complicated than that.

I stand corrected, thanks

grumpy_codger

Section62 said:

grumpy_codger said:

Section62 said:

teaselMay said:

grumpy_codger said:

teaselMay said:

...The mains in general hums at 50Hz.

100Hz            

No idea where you are if the mains is 100Hz

The hum from a transformer is typically double the mains frequency.  Though the totality of the subject of 'hum' is a lot more complicated than that.

What exactly is more complicated (in terms of doubling the frequency)?

"...the totality of the subject of 'hum'..."

Harmonics... for example.  

Yes, there will be 200, 400, 800.... but hardly noticeable.

ButterCheese

Nothing more to add, except next time you are due for a new toothbrush, get an ultrasonic one and/or one with a simple charger that you plug in to a normal socket.  Mine was very cheap(£14 odd) and is excellent.  Charger is silent and is just a USB to pointy end

sandyman80

So I'll take that as a NO then since nobody has suggested one?

Rodders53

Such sockets are crude mains isolating transformers and consume around 20 Watts when on, without a load from shaver or toothbrush. It is therefore a wise money saving thing to not leave them ON all the time to reduce electric consumption.

Our Oral B toothbrushes can last a few weeks between charges, as will my rechargeable Phillips wet/dry shaver. As others have stated.

I have yet to find a silent mains shaver socket.

Some shaver sockets have a power switch operated by the plug being inserted, others may have a manual on/off switch (perhaps also operating a light).  Rarely some are on all the time and need an external switch to save money and the noise.I
But there should be absolutely no need to leave a device on charge all the time (and I suspect the makers manual merely says it is safe to do that, rather than it is necessary...).

grumpy_codger

Rodders53 said:

Such sockets are crude mains isolating transformers and consume around 20 Watts when on, without a load from shaver or toothbrush. It is therefore a wise money saving thing to not leave them ON all the time to reduce electric consumption.

20W is exaggeration. AFAIK, the load is 20-40W max, so it can't consume 20W without load (well, it possibly can if connected to the CU with 100m cable).

I checked mine and it consumes 4-5W - and for testing (with my smart meter) I plugged in an extension lead with two (empty) USB ports that do consume some very small power.

Risteard

Most shaver sockets are NOT designed for charging electric toothbrushes. Those that are will contain a toothbrush emblem on them to indicate their suitabililty. A toothbrush is not an intermittent load like a shaver.

RavingMad

Close the door to the ensuite? Charge it during the day? Charge it once a week?

teaselMay

Maybe just the houses I go in but I don't think I've seen a shaver socket since I left home in 1994