Author Topic: CRT active kewl  (Read 2264 times)

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Offline tp4tissue

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CRT active kewl
« on: Wed, 22 December 2021, 08:30:16 »
Bough some m0ar Arctic p12 fans + a dust filter.  off 5v adapter, can't hear it.

This will probably impact color requiring recalibration.

These small crts run between 50-70 watts.   That qualifies for active cooling.

Savon Pat, a sony bvm tech recommends active..

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Offline yui

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Re: CRT active kewl
« Reply #1 on: Thu, 23 December 2021, 01:37:56 »
the thing is with CRT, the parts that are hot and using most of the power is not silicon, when you talk chips, diodes and transistors yes 70W is well in the realm of needing beefy cooling, when you are talking about incandescent light bulbs, cooling it would only reduce its brightness, and electron guns are an incandescent light bulb with a 3rd high potential contact, the cathode need to be red hot for the electron to be able to "jump" and form the "cathode ray". although if you only put a fan in with a dust filter you are unlikely to cause any arm, or even any difference, without the dust filter it could be really bad though as introducing more dust can cause shorts and overheating of the flyback.
one thing you could do if you trust yourself not to touch the high and mains voltages inside is to run it open and look at the boards for component getting hot, other than tubes/valves, i would not expect many to do so though, just so that you do not waste your time and money on modding CRTs
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Offline tp4tissue

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Re: CRT active kewl
« Reply #2 on: Thu, 06 January 2022, 10:28:41 »
After all these years, still very difficult to fotograph CRTs.

Cool thing is nowadays we can play 1280x692  w/ 4x SSAA @ ~100fps  on a budget card like 1060

The 71khz crt will take 97hz refresh @ this res.  + full 3dlut color correction is available now through reshade.

This is definitely necessary for CRTs, because there's so much color cast to these old analog systems when you alter their default response curve.. Correcting color in 3 dimensions really is a must, 1D correction just looks weird.


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