LCD screen that does 15khz! - Page 2

19 June 2010, 20:04

I recently bought one of those BenQ G922HDLs, and I can't get it to sync down below 30kHz
I've contacted the author of the blog for more info, and I'm still waiting for an answer
It can't be a firmware problem since they only have one firmware version (I was told by BenQ)

amiman99 · 20 June 2010, 17:38

I just got Viewsonic VX2433wm, 24 in monitor with 3 independent inputs, HDMI, DVI and VGA.
The few good things about it:
1. Does 50Hz
2. 3 inputs, I have my PC and A3000 on it at the same time, no need for video switcher
3. Has speakers, not that good but works fine
4. Can select 4:3 ratio

It does not scan down to 15KHz

, the range is 24-83KHz
but,
Finally I can play PAL games on VGA monitor

also, works well with Atari STE in mono mode

Abaddon · 17 October 2010, 04:38

I decided to try hooking one of my 1200s to my Dell ST2410 monitor, so I purchased Amiga RGB to VGA Monitor Adapter from AmigaKit. I switched to DBLNTSC and hooked it up to the Monitor and it worked fine. I launched Harlequin via WHDLoad, which I thought would have given me a blank screen, but the game actually displayed. I tried my other 1200 without switching to DBLNTSC and it worked as well.

It appears that the Dell ST2410 24" is able to handle the 15khz signal from the amiga. I do not have a flicker fixer or scandoubler in either of my amigas.

jotd · 17 October 2010, 21:14

Abaddon you were lucky that it worked!

alexh · 17 October 2010, 22:05

Quote:

Originally Posted by Abaddon

It appears that the Dell ST2410 24" is able to handle the 15khz signal from the amiga.

60Hz only? Or 50Hz too? What does it do to the aspect ratio? Can you set 4:3 mode? If you try an interlaced screen does it flicker?

Abaddon · 18 October 2010, 00:53

Quote:

Originally Posted by jotd

Abaddon you were lucky that it worked!

I was lucky, but even if it didn't work I wasn't out anything as it is my main PC monitor. It's also nice that I can select between inputs using the the monitors menu, so i can switch between the Amiga (VGA) and the PC (DVI) using the built in menu.

Abaddon · 18 October 2010, 00:55

Quote:

Originally Posted by alexh

60Hz only? Or 50Hz too? What does it do to the aspect ratio? Can you set 4:3 mode? If you try an interlaced screen does it flicker?

I've only tested with 60hz, but I will test to see if it can handle PAL as well. You can select fill or 4:3 from the monitors menu.

Interlace modes still flicker

DBLPAL mode is not supported, but PAL mode for games is. I tested it with Rainbow islands. In NTSC mode the screen seems to keep getting pushed down below the scores, but in PAL mode this issue is not present.

alexh · 18 October 2010, 15:01

Cool, 15KHz, 50Hz compatible with 4:3 aspect ratio select with no flicker in non-interlaced modes. Sounds very usable.

Darth_X · 27 November 2013, 22:47

Wish there was an Amiga fan who worked in a TV shop who could check if any LCD TVs can input 15khz video..

Solo761 · 28 November 2013, 09:13

Btw. my Dell U2311H LCD monitor can display 15KHz picture. I tried hooking up A500 and A1200 directly to it and it works fine. Amigas are PAL, both WB and games work, monitor has setting for 4:3 aspect ratio.

Lord Aga · 28 November 2013, 11:11

Wow that's great !
So, just an Amiga RGB to VGA adapter and that's it ?

Solo761 · 28 November 2013, 12:47

Yup, just the homemade adapter. From what I read every U2x11H should work, but newer edition U2x12HM doesn't support this.

Btw. I made an error with that drawing, on DB15 connector wire (VSYNC) that goes to pin 15 should go to pin 14, pin connections list above the drawing is correct.

16 June 2014, 01:53

Hi Everyone

has anyone found a currently available screen that works ? I have been able to find any of the mentioned screens posted here

Edwin

Daedalus · 20 June 2014, 12:04

The Dell U2410 also works well with 15kHz video input, but it's not on sale any more either. I reckon there are a good few types that should be easy enough to get second-hand though if you look around...

Darth_X · 22 August 2014, 06:48

Quote:

Originally Posted by Daedalus

The Dell U2410 also works well with 15kHz video input, but it's not on sale any more either. I reckon there are a good few types that should be easy enough to get second-hand though if you look around...

The interesting thing is that used models of this monitor, dell U2410, seem to sell for high prices..

mc6809e · 22 August 2014, 07:15

Quote:

Originally Posted by edwin pibal

Hi Everyone

has anyone found a currently available screen that works ? I have been able to find any of the mentioned screens posted here

Edwin

If it were me, I'd go looking first for something that will turn the Amiga's RGB into component video or S-video.

Component and S-video look almost as good as genuine RGB and many televisions will accept one or the other or both.

02 May 2017, 05:54

Sorry for the thread necromancy, I wasn't sure of the rule about that.

I recently picked up a 23-pin RGB to 15-pin VGA connector which I was going to use to connect to one of those cheap Chinese scan doublers. But I was curious and was wondering if any screen in my house somehow supported 15hz. It was a long shot and I assumed it wouldn't work with any of them but some how one of them actually worked!

Full video of the action: [ Show youtube player ]

The model is a Magnavox 17MD255/17. They're pretty cheap from what I've seen online.

nobody · 02 May 2017, 09:00

Maybe the truth is these monitors are not 15khz, they are just "able to handle" 15khz signals. Take a picture of 240p then upscale to 480p and display it, hence the 24khz mark

15khz means 240p resolution and these monitors don't have such a resolution.

PS. I guess they do the same job a "scandoubler" does
PS2. 50 (fps) * 480p = 24.000 = 24khz. But not bad, it's an alternative if you don't have space for a CRT. If your monitor has 24 khz mark will be able to do this I guess

amiman99 · 02 May 2017, 21:03

I have another monitor: Cornea CT1702T works natively with Amiga

Older monitor/TV, not the best picture quality.

MartinW · 02 May 2017, 23:56

I bought a Microvitec 1438 CRT recently because it seems to be banded about as the "perfect Amiga monitor" (it's actually Amiga branded by Microvitec).

I don't know if I have higher expectations than others, or if mine is just faulty but the flicker in PAL Interlaced mode is horrendous so I'm not really sure how this can be the perfect Amiga monitor

Granted it looks lovely in non interlaced mode for games and demos and Super 72 Interlaced 800x600 is pretty nice, but my ECS machine can only do that in 4 colours so it's not very good for that. If I'm honest, I'm not sure that there is such a thing as a perfect monitor for an Amiga, CRT or LCD. They were out at an awkward time where screens had progressed from CGA but not made it to the point of being friendly to our now modern stuff.

17 October 2010, 04:38	#23
Abaddon Registered User Join Date: Apr 2010 Location: Chicago/USA Age: 54 Posts: 651	Dell ST2410 and Amiga RGB to VGA Monitor Adapter (Amigakit) I decided to try hooking one of my 1200s to my Dell ST2410 monitor, so I purchased Amiga RGB to VGA Monitor Adapter from AmigaKit. I switched to DBLNTSC and hooked it up to the Monitor and it worked fine. I launched Harlequin via WHDLoad, which I thought would have given me a blank screen, but the game actually displayed. I tried my other 1200 without switching to DBLNTSC and it worked as well. It appears that the Dell ST2410 24" is able to handle the 15khz signal from the amiga. I do not have a flicker fixer or scandoubler in either of my amigas.

02 May 2017, 09:00	#38
nobody Registered User Join Date: Dec 2013 Location: GR Age: 46 Posts: 1,416	Maybe the truth is these monitors are not 15khz, they are just "able to handle" 15khz signals. Take a picture of 240p then upscale to 480p and display it, hence the 24khz mark 15khz means 240p resolution and these monitors don't have such a resolution. PS. I guess they do the same job a "scandoubler" does PS2. 50 (fps) * 480p = 24.000 = 24khz. But not bad, it's an alternative if you don't have space for a CRT. If your monitor has 24 khz mark will be able to do this I guess Last edited by nobody; 02 May 2017 at 09:12.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
WinUAE on Arcade Monitor at 15kHz	blagger	support.WinUAE	8	28 May 2011 18:01
hack a PC VGA monitor for 15KHz?	orange	Hardware mods	28	21 November 2010 22:33
Screen Size on LCD - ClassicWB AdvSP	rossb	project.ClassicWB	9	05 May 2010 09:00
Videocard for 15Khz Arcade Monitors!!!	MazinKaesar	Retrogaming General Discussion	5	14 April 2010 22:00
Broken Amiga Screen 15khz screen er 15pin?	redblade	support.Hardware	2	10 October 2004 01:00

19 June 2010, 20:04	#21
z-nexx Posts: n/a	I recently bought one of those BenQ G922HDLs, and I can't get it to sync down below 30kHz I've contacted the author of the blog for more info, and I'm still waiting for an answer It can't be a firmware problem since they only have one firmware version (I was told by BenQ)

20 June 2010, 17:38	#22
amiman99 Registered User Join Date: Sep 2009 Location: San Antonio, TX USA Age: 50 Posts: 1,184	I just got Viewsonic VX2433wm, 24 in monitor with 3 independent inputs, HDMI, DVI and VGA. The few good things about it: 1. Does 50Hz 2. 3 inputs, I have my PC and A3000 on it at the same time, no need for video switcher 3. Has speakers, not that good but works fine 4. Can select 4:3 ratio It does not scan down to 15KHz , the range is 24-83KHz but, Finally I can play PAL games on VGA monitor also, works well with Atari STE in mono mode

17 October 2010, 21:14	#24
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,170	Abaddon you were lucky that it worked!

18 October 2010, 15:01	#28
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,339	Cool, 15KHz, 50Hz compatible with 4:3 aspect ratio select with no flicker in non-interlaced modes. Sounds very usable.

27 November 2013, 22:47	#29
Darth_X Commodore and Amiga Join Date: Sep 2013 Location: Vancouver Island, BC, Canada Posts: 14	Wish there was an Amiga fan who worked in a TV shop who could check if any LCD TVs can input 15khz video..

28 November 2013, 09:13	#30
Solo761 Registered User Join Date: Aug 2013 Location: Croatia Age: 43 Posts: 341	Btw. my Dell U2311H LCD monitor can display 15KHz picture. I tried hooking up A500 and A1200 directly to it and it works fine. Amigas are PAL, both WB and games work, monitor has setting for 4:3 aspect ratio.

28 November 2013, 11:11	#31
Lord Aga MI clan prevails Join Date: Jul 2010 Location: Belgrade, Serbia Posts: 1,443	Wow that's great ! So, just an Amiga RGB to VGA adapter and that's it ?

28 November 2013, 12:47	#32
Solo761 Registered User Join Date: Aug 2013 Location: Croatia Age: 43 Posts: 341	Yup, just the homemade adapter. From what I read every U2x11H should work, but newer edition U2x12HM doesn't support this. Btw. I made an error with that drawing, on DB15 connector wire (VSYNC) that goes to pin 15 should go to pin 14, pin connections list above the drawing is correct.

16 June 2014, 01:53	#33
edwin pibal Posts: n/a	Hi Everyone has anyone found a currently available screen that works ? I have been able to find any of the mentioned screens posted here Edwin

20 June 2014, 12:04	#34
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,335	The Dell U2410 also works well with 15kHz video input, but it's not on sale any more either. I reckon there are a good few types that should be easy enough to get second-hand though if you look around...

02 May 2017, 05:54	#37
boratintheuk Posts: n/a	Sorry for the thread necromancy, I wasn't sure of the rule about that. I recently picked up a 23-pin RGB to 15-pin VGA connector which I was going to use to connect to one of those cheap Chinese scan doublers. But I was curious and was wondering if any screen in my house somehow supported 15hz. It was a long shot and I assumed it wouldn't work with any of them but some how one of them actually worked! Full video of the action: [ Show youtube player ] The model is a Magnavox 17MD255/17. They're pretty cheap from what I've seen online.

02 May 2017, 21:03	#39
amiman99 Registered User Join Date: Sep 2009 Location: San Antonio, TX USA Age: 50 Posts: 1,184	I have another monitor: Cornea CT1702T works natively with Amiga Older monitor/TV, not the best picture quality.

02 May 2017, 23:56	#40
MartinW Registered User Join Date: Mar 2017 Location: Minehead / UK Posts: 608	I bought a Microvitec 1438 CRT recently because it seems to be banded about as the "perfect Amiga monitor" (it's actually Amiga branded by Microvitec). I don't know if I have higher expectations than others, or if mine is just faulty but the flicker in PAL Interlaced mode is horrendous so I'm not really sure how this can be the perfect Amiga monitor Granted it looks lovely in non interlaced mode for games and demos and Super 72 Interlaced 800x600 is pretty nice, but my ECS machine can only do that in 4 colours so it's not very good for that. If I'm honest, I'm not sure that there is such a thing as a perfect monitor for an Amiga, CRT or LCD. They were out at an awkward time where screens had progressed from CGA but not made it to the point of being friendly to our now modern stuff.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)