CurtPalme.com Home Theater Forum

[nidi]

Anyone here using Barco Splitpacks?


how do they compare picturewise (noise) to the normal 909/919/Cine 9's?

Michael

[cmjohnson]

There is no reason that their picture quality should be any different assuming the lenses are the same.

Somebody on ebay has been trying to sell four 919 split pack head units for quite some time now.

But it's only the head units. No driving electronics units.

The lenses are curved screen types and without information about the tube condition, they're worthless.

I've asked the seller to provide information on them like showing at least the green tube's faces, but have not
gotten a response, which implies to me that they're toast and worthless as a result.

[km987654]

[ElTopo]

Hi Michael,

pic quality is 1:1 to a normal chassis 909 or Cine9.

As for the noise they are 'louder' because they don't have the plastic cover around.



cheers
ElTopo

[nidi]

By noise I mean high frequency bckground noise seen in the picture.

I remember seeing a Cine 9 that had quite a lot of noise in the picture the can be seen in closeup.

log cable runs normally mean more noise that can be picked up.


Michael

[Francisco]

I own a 919/909 split pack for quite some time now. It doesn't perform exactly like a 909 FP. The long cable run and additional connection boards do effect PQ. I replaced the RGB cables to premium shielded RG59. Also the light output is lower in split pack versions. connecting RGB end stages directly to mainboard solves this problem. So yes they are different but with some modifications they can perform the same or better.

[nidi]

Francisco,

interesting,


can you tell us what you did to improve picture and brightness.

Pictures would be great


Thanks


Michael

[Francisco]

It's all in here: https://www.curtpalme.com/forum_archived/viewtopic.php@t=33525.html

[redfox001]

[dummyload]

I did a quick measurement about the j40 connection and from my readings only the filament voltage is loosing about 0,5V over the 4 extra connectors and the long cable in a split pack compared to a normal chasis ,if this is the problem then the solution is easy crank up the filament voltage on the mainpower supply until the filament voltage is correct on the neckbords.But I'm confused reading the manual about regulating the filament voltage they state 6V ,I thought it has to be 6,3V ?

[Hulio]

Good to see you active again Dummyload.
The filament voltage on BR 909/SEOS 919 should be set to 6V. The start voltage is 6,3V and drops to 6V after one minute.
The Cinemax/Cine 9 does not do that, therefore the filament voltage is set to 6,3V indeed.

[dummyload]

Due to circumstances still short of time for the fun stuf Hulio.
That is what confused me why 6V on the br909 , the filament voltage is critical to performance and lifetime of the tube. There is no difference between cine9 and br909 power supply (the controller has no function in this ,except that the controller can put the filament voltage of when in pause)so I think it is a typo.
What I measure is the reverse of what the manual says starts 0,3v lower and goes up about 0,3v and that makes perfectly sens because the filaments are ptc ,meaning resistance is lower cold so drawing more current at start up so voltage is lower at start up.
So my question , is the correct filament voltage for a lug tube 6,3V ?

[gjaky]

[Hulio]

[dummyload]

Gjaky that is what I thought but my memory gets rusty , and barco manual says something different.

Hulio interesting info , confusing but for now I stick with what I measure and what the schematics tells me ,and the lug needs indeed 6,3V .

Errors happen I'm pretty shure there is one in the manual about regulating the trimmer for 34,7KV on the splitter too.