CRT Hz

You know I have never come across this and I don't think I ever bothered to find out. If I have read this before then I forgot it but what in blaze is the Hz rating for on a CRT. I would naturally assume that it means how fast is can raster paint an image on the screen

It's refresh rate, the higher the Hz (Hertz=cycles per second) the more times the image on the screen is redrawn by the electron gun in the tube. 60Hz is hard on the eyes, anything 75Hz or over will reduce eye strain and headaches.

[quote]Originally posted by MacGyver:
<strong>It's refresh rate, the higher the Hz (Hertz=cycles per second) the more times the image on the screen is redrawn by the electron gun in the tube. 60Hz is hard on the eyes, anything 75Hz or over will reduce eye strain and headaches.</strong><hr></blockquote>

Cool, that's what I figured. Now is that for the Yolk (wouldn't think so) or for the gun?

[quote]Originally posted by ßracius:
<strong>

Cool, that's what I figured. Now is that for the Yolk (wouldn't think so) or for the gun?</strong><hr></blockquote>

or they the same thing! Narf! Long day, I need to go home, :D . Wait... no there not........... It's been a long day

[quote]Originally posted by MacGyver:
<strong>It's refresh rate, the higher the Hz (Hertz=cycles per second) the more times the image on the screen is redrawn by the electron gun in the tube. 60Hz is hard on the eyes, anything 75Hz or over will reduce eye strain and headaches.</strong><hr></blockquote>

I knew what Hz where and the gun thing, but I didn't know it could ease eye strain...

Thanks...I LEARNED SOMETHING...YEEEEE HAAAW

Higer hertz is always better, a really good monitor will let you keep it high in the higher resolutions. I tend to run 1152x864 at 100 Hhz on my 17 inch. One thing to keep in mind, the higher the refresh rate the quicker the monitor will burn out.

Apart from mains frequency, there are three significant frequency ratings for monitors. The refresh rate already mentioned, equates to vertical scan rate, and applies to the vertical scan coils in the deflection yoke. Typically from horrible 43Hz interlaced to over 100Hz.

The horizontal scan, from 37.5KHz to over 100KHz, determined by the screen resolution, and applied to the horizontal coils in the yoke.

Then there's the video bandwidth, which determines the sharpness of the detail the monitor can display, in conjunction with the screen dot pitch. It will be in MHz, and refers to the video circuitry, through to the gun assembly in the CRT.

Hope this clarifies things for you, Bracius

Heh, you mentioned mains, thats 50 or 60 HZ from the wall socket depending on where in the world you choose to view your monitor.

[quote]Originally posted by LagMonster:
<strong>

I knew what Hz where and the gun thing, but I didn't know it could ease eye strain...

Thanks...I LEARNED SOMETHING...YEEEEE HAAAW</strong><hr></blockquote>

yea i didn't know that either, this post prevented me from unnecessary vision loss woohoo!