[mythtv-users] OT: LED or Plasma (was Advice on choosing a TV)

[Andre]

On 25 May 2010, at 08:41, Paul Gardiner wrote:

> Alasdair Macdonald wrote:
>> On 24 May 2010 19:05, Paul Gardiner <paul at laser-point.co.uk> wrote:
>>> Alasdair Macdonald wrote:
>>>> I don't hear any unwanted noise at all coming from my screen.
>>> Really?! Maybe mine is faulty. Have you tried playing a movie
>>> with the sound muted? The sound I hear changes with the picture
>>> movement. The sound comes from the back, so if you have something
>>> soft behind the set that may damp it out. I have mine wall
>>> mounted.
>> If I mute, and put my ear close to the (now wall-mounted) screen, in 1
>> or 2 positions I can make out quiet buzzes. If my ear is more than 6
>> inches from the screen, I can't hear anything. I guess the wall is
>> allowing any sound to multiply & bounce (not dampen) before it reaches
>> my ear; I consider the hardware near-silent.
> 
> Mine seems to have quietened down now. I can still hear it but now
> only if I mute the TV and strain to hear it. Weird! Maybe it's part
> of burning in.

It used to be common that scan coil windings and linearity corrections coils in olde CRTs would vibrate until they had warmed and cooled a few times, had to melt wax into the odd one as a junior TV tech. Sometimes switch mode power supplies do similar, maybe that's what you were hearing.

Glad you like the TV, thought you would... I like the 600hz mode when it's working well but I can't tolerate it's failures, you should see some real 600hz video, actually shot at 600hz, wow! There's considerable interest in 300hz cameras as they can simultaneously output great 60hz, great 50hz and great super slomo too, I think I spotted one of the prototypes being used in Vancouver. Will be a long long while before we ever see a real 300hz live TV transmission but we should get the benefit of it behind the scenes around the time 1080p50 & 1080p60 transmissions start.:-))

Andre


> 
> Hmmm, or maybe what I was hearing was very high volume ultrasonics,
> and the TV has now wiped out that part of my hearing range!! - hmmm,
> unlikely I suppose.
> 
> Paul.
> 
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