CurtPalme.com Home Theater Forum

**AnalogRocks** · Posted: Mon Feb 27, 2023 5:07 pm Post subject:

I like the curved 15 gain screens SONY had in the early days. Made out of fiberglass.
Yes it hot spots but when you're in the sweet spot it's bright.
I bought mine on Craigs List for $100 +$300 to ship it to Buffalo. Then I went and picked it up;.

Videodrome · Joined: 22 Feb 2023 Posts: 56

The JVC looks really nice, but I can’t find anything on the internet about motion clarity and projectors.
I did read it has “Motion Enhance”, I wonder how this looks and if it’s able to process it in combination with low-latency mode.

For non-interactive content like films, motion clarity feels less of an issue compared to playing 3D games.
Where you control the camera and start looking off-center, before panning.
I’ll make a topic on the digital forum to see if people are willing to test their projector on https://www.testufo.com.

I spend quite some hours going through different websites for projector screens.
I decided to get a cheap local version with a 1.6 gain for now.
If the brightness looks ok but colors are off, I might get a better one.

**kal** · Posted: Tue Feb 28, 2023 2:34 pm Post subject:

My JVC is a 2013 model (DLA-RS56U) and some gamers will tell you that the input lag is too high but I frankly do not notice it. We play a lot of PS4/PS5 games and nobody complains. Thousands of hours of gaming in fact. 60Hz console games are buttery smooth. Annoys me to go back to something older that's only 30Hz. I can't say I notice anything that resembles lag. I know that newer models have much lower input lag too if it bothers people.

Kal

Videodrome · Joined: 22 Feb 2023 Posts: 56

Received the 1.6 gain screen today.
Though it shows a lot more in an ambient lit room, at perfect dark it makes no difference from the previous 0.95 gain screen. So that’s dissappointing, I was hoping for more brightness in a dark room. Is this because it’s a ‘cheap’ version, or is that how gain screens work? Improvement in ambient conditions, but hardly any in dark conditions.

Anyway, I’m hoping this weekend my fake fansensors will arrive so I can start working on the new exhaust system. The fan on max speed has about 700cfm, so it should be more than sufficient at 50%. I'll have temperature sensors on the heatsinks to make sure.

About the smoothness, and maybe you already understand, it’s more about not having any blur while moving the camera. Low quality laptops and the ‘steamdeck’ for example has an incredible amount of ‘smearing/ghosting’. Where you don’t even have to turn on motion blur in the game settings, because the screen does it for you…

The best way for me to describe how it feels, is that when you pan the camera and stop, the moment you stop, the screen shows more detail and no more blur. While on crt, even while there is movement, it stays crystal clear. Is that the case with your JVC at 60hz?
//this doesn't have to be a fast movement, turning around 1 time (360 degrees) in 30 seconds would already show the blur.

When, in a few years, I’m going to buy a high-end projector I’ll make sure to visit some showrooms and do tests myself. Though it would be nice if you have any information on this. It would relieve some of my worries, knowing that at the end of crt life there is a viable solution. Wink

**kal** · Posted: Thu Mar 02, 2023 2:10 pm Post subject:

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Videodrome · Joined: 22 Feb 2023 Posts: 56

I'm returning the screen. I was wrong thinking it had better ambient performance.

I received some sample A4 sheets from my old screen manufacturer.
One is the same type as my previous screen, 0.95 gain.
When I put the sheet on the screen it looks exactly the same wherever I put it, ambient light or not.
So that was some nice false advertising.

Just so I knew my eyes wouldn't deceive me, another sample was a silver/gray 1.1-1.2 gain sheet and it did show improvement.

About the motion, again Cool

.
Display persistence is exactly what I meant.
Good to hear JVC DILA is a good performer, do you feel it's on par with CRT projectors?

**kal** · Posted: Thu Mar 02, 2023 6:43 pm Post subject:

Videodrome · Joined: 22 Feb 2023 Posts: 56

Minor update on the fan noise.
Today I’ve replaced the 3 fans at the back with a custom duct going to a 200mm fan. At the lowest setting it keeps everything cooler than the stock fans while being quiet so I’m happy. I’m reaching the point I can enjoy the projector without having to put on headhpones. Finally.

The input A board fan is the last one that needs replacing. Still can hear a whine over the lower sound the duct fan makes. So I’ll replace that one with a 60mm low noise fan. I wonder how hot it will get since I’m not using any inputs from that board. It might not need the fan, but rather be safe than sorry..

Stock noise was 40-46db, using a phone app so not that accurate.
Duct replacement made it 36-38. Great improvement in my book.

Also ordered a new screen which should arrive in a couple of weeks.
Draper Argent White XH1500E 1.5 gain to be exact. Hope that gives me more pop so I can fully enjoy the projector.

**kal** · Posted: Sat Mar 04, 2023 2:13 pm Post subject:

Videodrome · Joined: 22 Feb 2023 Posts: 56

I totally agree.

Last year I finally got rid of studio monitors I had been using for over a decade. Since I’m partly in the audio business I thought it would be a smart move to get them, and people online tend to rave over studio monitors. The hiss was driving me insane during work and at night. Not that apparent, but enough you'd get that moment of 'What am I hearing?? Where is it coming from??''. My room is about 24db without the projector running, so it becomes easy to hear any hiss, fans and electrical noises like a bad power supply. I replaced them with a good set of mono-amps and passive speakers, recommended at audioscienereview.com.

The same with contrast ratio’s. Companies claiming insane amounts of contrast ratio which 9 out of 10 times meant you’re staring at a lightbulb at full brightness and black becoming dark gray. That might actually be my only minor gripe with crt’s, the black level is good but not OLED good. In the movie “Once upon a time in Hollywood” they start out with a small square frame, which in a complete dark room and oled just looks fantastic. It put a smile on my face realizing how true black, oled was. The tv-frame no longer mattered. If only the motion was better…

I put 2 temperature probes, normally used for aquariums according to amazon, on the left and right heatsink with some gafffer tape, near the outward flow fans. The green tube heatsink was a bit bothersome because the wire wasn’t long enough.
About 10 degrees celsius over room temperature when running, and with the new duct system 6-8 degrees, so mission accomplished in that regard.

Tomorrow I’ll replace the final fan and then I should be satisfied.
Watercooling won’t be an option. Cool

**AnalogRocks** · Posted: Sat Mar 04, 2023 3:59 pm Post subject:

We need some pictures of your air ducting setup!

I have an Amro 4000 here where someone added 2, 80mm fans to keep things cool. I'd love to see what you did.

**kal** · Posted: Sat Mar 04, 2023 4:05 pm Post subject:

Videodrome · Joined: 22 Feb 2023 Posts: 56

I’ll try and take some pictures of the setup soon, depending on how well the last fan replacement goes.

I have a moome IFB card for HDMI input.
INPUT 1 goes to a splitter for Playstation and PC input.
Does 12-bit color input matter a lot? I might connect them directly to the IFB card INPUT 1/2 instead of the splitter which doesn’t give me the option to use 12-bit.

The PC has enough control to change gamma, brightness and contrast settings, both in the nvidia driver and videoplayer. I’m still tinkering and adjusting per movie, not ideal but I blame that more on some movies being shot too dark.
For now I have the gamma on the moome card maxed. Otherwise it's simply too dark, which might also be because of the 0.95 gain screen.

Thanks for the calibration link, very in-depth. Too much for now, but I might do something like this in the future.

As for watercooling, submerging the entire projector in mineral oil would be the only workable ‘solution’.
No way I’m going to do that though.

**kal** · Posted: Sat Mar 04, 2023 7:22 pm Post subject:

Videodrome · Joined: 22 Feb 2023 Posts: 56

Replaced the final fan in the INPUT A board, what a difference!
Now I only hear the low hum of the duct.

A few pictures, I didn’t want to take everything apart so it doesn’t show everything.

Welcome to earthquake country, Japan.
It sits on top of a 150cm metal rack and I secured everything with the ceiling.
Temperature sensors, temporary, taped to the left and right.
Taped a filter over the intake, to reduce dust.

The duct. Custom made and sadly a lot heavier than expected.
Used doublesided velcro tape so it’s not a permanent connection.
I also had to secure it with a wire to the stability beams going to the ceiling, which means I can’t take off the cover for now. I need to replace the wire with some sort of quick release.
The duct itself goes to a small walk-in closet where my ps5 and NAS also sit.

The hole I cut for the 60mm fan. I secured it with tieraps and 4 small pieces of mousemat on the sides so it has a cushion and won’t vibrate. I did exactly the same for the psu fan, replaced with a 80mm noctua fan.

For now I’m done with the modding and very happy with the outcome.
I’ll just have to wait for the 1.5 gain screen and then I can fully enjoy this baby.

**AnalogRocks** · Posted: Mon Mar 06, 2023 7:29 am Post subject:

So we can call this a SONY D50 MO - Modded Out version or just plain "Cool" :thumbsup"

Thanks for the pictures.

Did you see someone in Singapore is selling 3 more D50's new? That's 4 total in a short time. Weird but neat.

Videodrome · Joined: 22 Feb 2023 Posts: 56

Thanks, I'm not familiar with the Singapore seller, I got it at ebay, shipped from the USA.
Any link?

I'm expecting some things tomorrow which will make it easier to remove the cover when necessary.
I'll post a few pictures of the new fans.

The only drawback of this setup is that when I need to remove the cover and adjust the lens angle or flapping, there won't be any cooling. I need to put the stock fans inside and plug them in whenever I do this, not ideal. It shouldn't happen too often so it's not worth cutting out the entire back of the cover, just yet.. Then again, I do enjoy modding Cool

**kal** · Posted: Mon Mar 06, 2023 1:16 pm Post subject:

Videodrome · Joined: 22 Feb 2023 Posts: 56

I have a few new questions,

~~When turning the ABG off, it still shows a faint line in the blue tube, is this normal?~~

The powersupply has a buzz, volume differs and sometimes goes completely away after ‘ringing’ for a short time.
So it goes from a loud constant buzz to something like buzz…..buzz…buzzz..buzz.buzzbuzzbuzz, and poof, the buzz is gone or very low volume. Anyone knows what the faulty component could be. I might send it away to get it fixed.

Can I move the powersupply of a 120v D50 projector to a 220v D50 projector, or vice versa, and have it work without any problems? Of course making sure the input voltage would be correct.
I can’t imagine they have other components work differently, because the power-output from connection pins should be the same, no?

// I was wrong about ABG problem, it shows no lines when turned off.
What I meant was with pic-muting on, blue shows a horizontal line at the top of the screen. The other tubes seemed to be turned off completely. Is this normal behavior?