I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops if I
unplug the lamp.
Any ideas on how to stop the buzzing.
thanks

SS wrote:
I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops if I
unplug the lamp.
Any ideas on how to stop the buzzing.
thanks


First try running the lamp via a second extension lead, and if that
doesn't help, try moving the lamp about the same distance again away
from the radio.

It seems the electronics in the lamp are transmitting interference
either along the cable or through free space.
--
Tciao for Now!

John.

On Tue, 30 Aug 2011 20:22:49 +0100, "SS"
wrote:

I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops if I
unplug the lamp.
Any ideas on how to stop the buzzing.
thanks

Err - unplug the lamp.

HTH -
--
Frank Erskine

John Williamson wrote:

SS wrote:

I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. When both are plugged in the alarm gives a low annoying
buzz

It seems the electronics in the lamp are transmitting interference
either along the cable or through free space.

It's not unknown for the radio's aerial to be within the mains flex
where the earth conductor isn't.

"Frank Erskine" wrote in message
...
On Tue, 30 Aug 2011 20:22:49 +0100, "SS"
wrote:

I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops if
I
unplug the lamp.
Any ideas on how to stop the buzzing.
thanks

Err - unplug the lamp.

HTH -
--
Frank Erskine


Maybe I should have mentioned I want to keep both plugged in. :-)

Is this a lamp with a transformer or switch mode psu in it by any chance?

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"SS" wrote in message
...
I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops if
I unplug the lamp.
Any ideas on how to stop the buzzing.
thanks

"Brian Gaff" wrote in message
...
Is this a lamp with a transformer or switch mode psu in it by any chance?

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"SS" wrote in message
...
I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops
if I unplug the lamp.
Any ideas on how to stop the buzzing.
thanks




Brian it is one of those lamps that you just tap it and it changes the light
ouput (3 different levels) so I guess it must have something built in.
It doesnt have an on/off switch, just tap it and it goes off or on.

In article ,
SS wrote:

"Frank Erskine" wrote in message
...
On Tue, 30 Aug 2011 20:22:49 +0100, "SS"
wrote:

I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops if
I
unplug the lamp.
Any ideas on how to stop the buzzing.
thanks

Err - unplug the lamp.

HTH -
--
Frank Erskine


Maybe I should have mentioned I want to keep both plugged in. :-)

Try moving them apart. This will show if it's RF or mains borne
interference.

--
*Pride is what we have. Vanity is what others have.

Dave Plowman London SW
To e-mail, change noise into sound.

SS wrote:
"Brian Gaff" wrote in message
...
Is this a lamp with a transformer or switch mode psu in it by any chance?

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"SS" wrote in message
...
I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far from
socket.
When both are plugged in the alarm gives a low annoying buzz, but stops
if I unplug the lamp.
Any ideas on how to stop the buzzing.
thanks



Brian it is one of those lamps that you just tap it and it changes the light
ouput (3 different levels) so I guess it must have something built in.
It doesnt have an on/off switch, just tap it and it goes off or on.


Triac controlled by some circuitry which senses the hum induced by your
finger when it touches the lamp. The triac can generate RFI when there
is no suppression fitted or it is missing. If you radio has poor AM
rejection on FM, then that's what's causing your buzzing. Moving them
apart, even by a few inches, will help.

--
Tciao for Now!

John.

In article , John Williamson
wrote:
SS wrote:
"Brian Gaff" wrote in message
...
Is this a lamp with a transformer or switch mode psu in it by any
chance?

Brian

-- Brian Gaff - Note:- In order to reduce
spam, any email without 'Brian Gaff' in the display name may be lost.
Blind user, so no pictures please! "SS"
wrote in message ...
I use a cheapo electric alarm clock/radio, I also have a touch type
bedlight. Both require to be plugged into an extension as too far
from socket. When both are plugged in the alarm gives a low annoying
buzz, but stops if I unplug the lamp. Any ideas on how to stop the
buzzing. thanks



Brian it is one of those lamps that you just tap it and it changes the
light ouput (3 different levels) so I guess it must have something
built in. It doesnt have an on/off switch, just tap it and it goes off
or on.


Triac controlled by some circuitry which senses the hum induced by your
finger when it touches the lamp. The triac can generate RFI when there
is no suppression fitted or it is missing. If you radio has poor AM
rejection on FM, then that's what's causing your buzzing. Moving them
apart, even by a few inches, will help.

I have one of those lights right beside my DAB bedside radio. No problem.

--
From KT24

Using a RISC OS computer running v5.16

On 31/08/2011 19:32, charles wrote:
I have one of those lights right beside my DAB bedside radio. No problem.

Finally a good word for DAB!

Seriously I'm not surprised. It must surely be designed to reject a
little mains hum.

Andy

In article ,
Andy Champ wrote:
On 31/08/2011 19:32, charles wrote:
I have one of those lights right beside my DAB bedside radio. No
problem.

Finally a good word for DAB!

Seriously I'm not surprised. It must surely be designed to reject a
little mains hum.

It won't be a little mains hum. It could be nastly spikes caused by the
dimmer, albeit a mains frequency.

Andy

--
From KT24

Using a RISC OS computer running v5.16