Macintosh Color Display

Every CRT monitor I ever used got hot around the top vents after extended use. I think that's normal.

Best,

Matt

Are we seeing the emergence of the generation who have never used CRTs?

Like the generation that had never used vinyl records, or never not had the internet, or never seen dial phones, or &c &c &c

I bought a CD player at a thrift last week and the cashier said "Wow, people still use them?"

Very few here have ever used a large high resolution 19+" CRT made in the late 80's or very early 90's. Those CRTs throw off some crazy heat (and most have died a long time ago from it).

Newer CRT ran cool by comparison.

"What, grandpa -- without Direct Brain Interface, how were you able to enjoy movies??"

Invest in a power meter to understand power if you can't cope with theory.

My guess is that a 13" or 14" Trinitron (ie Macintosh Color Display) consumes about 70 Watts. Which means that it creates about 69 Watts of heat.

Experiment, Apostrophe. Hold your hand close to a 60 Watt luminescent light bulb. Is that hotter or colder than the back of your monitor?

Experiment, Apostrophe. Hold your hand close to a 60 Watt luminescent light bulb. Is that hotter or colder than the back of your monitor?

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As a follow up experiment, put your tongue on a frozen railing.

Surely a CRT wouldn't create that much of its power draw as heat? After all, they do end up emitting quite a bit of visible light (5-10W maybe?).

After all, they do end up emitting quite a bit of visible light (5-10W maybe?).

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Are you claiming that if you had six 14" monitors on in an otherwise unlit room, it would be as bright as if lit by a single 60Watt bulb?

After all, they do end up emitting quite a bit of visible light (5-10W maybe?).

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Are you claiming that if you had six 14" monitors on in an otherwise unlit room, it would be as bright as if lit by a single 60Watt bulb?

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Monitors put out kind of a directional light though. Maybe if you had them pointing all around the room, or if you diffused the light somehow. Also, the wavelength is different than an incandescent bulb, which makes it seem less bright than it really is. For example I have a 6500K (the light looks like it's blue) fluorescent lamp at about 20W, and a cool white lamp (looks like a very slight yellow) also around 20W, and the cool white lamp just seems to brighten up the room a lot more. I am assuming they have the same efficiencies.

Yeah, I was attempting a guess at the light output, based on extrapolation from roughly how much a single monitor used to light up my room at night.

Monitors use electrons striking a phosphor coating to produce light which seems roughly equivalent to electrons exciting mercury vapor producing ultraviolet light that then causes a phosphor coating to fluoresce, the only question is how much it actually is.

The one Watt power for display was not intended as an absolute; alas I do not have the equipment to measure it. The figure was an abstract number to illustrate that most of the power going in comes out as heat.

All the power going into or out of anything comes out as heat ... in the long run

I hate to go against you Bunsen, but when a DeLorean time-travels, it comes out very cold. Running on "The Power of Love", this is no doubt an unexplainable anomaly.

That's because it dumps all its waste heat into the timezone it's departing from - hence the flames.

Rats!

Frozen rats afore, and charred rats astern, I deduce.

de