CurtPalme.com Home Theater Forum

[Joust]

[Joust]

[Tom.W]

Sorry I think were on the same page now . The rods run thru the adapter plates and are secured to two metal plates . One at the bottom and one on the top of the chassis . The adapter plates then pivot on these rods for toe in of the lenses when doing a setup .

[Moose]

I have a set of crt/lens mounting plates with the continuous scheimpflug adjustments from a Barco 1208/2 I can send you, so long as you don't destroy them. Do you want one or all three?

To tell the truth, considering how they're made and assembled, I don't know how you will be able to adapt your Marquee solution to the Barco crt/lens assembly. For one thing, the Barco plates aren't plates, they appear to be thin, shaped (and machined) castings. There is a cylinder pressed into the crt plate that extends through the lens plate. I presume this cylinder is to keep everything centered. To me, these plates seem to be over-engineered but Barco is a big company and big companies do stuff like that. Because of the way the crt/lens assembly is made, it's easy to see why Bjorn abandoned scheimpflug adjustments. It would have been just too complicated to retain. It's my opinion that the best solution would be to replace both the crt and lens plates with one single plate. It's also my opinion that doing this won't be cost-effective and that, in the end, Galen's already existing solution will still be the way to go.

But I'm not an engineer. Hopefully you can see something I can't.

So, if you're interested, just PM your address and tell me if you want one or all three.

[picree]

All this talk about HD144's has caused me to do something I said I would NEVER do...namely take down the 808, put the HD144's on it and remount it closer to the screen...thanks guys. The lenses should be here today! (special thanks goes to person99-goodbye Rosco's).

The two plates also present another dilemma...the HD144/145 need to be closer to the CRT than the HD8's. What I have read is that the rear element needs to be about 2 mm from the CRT face when fully extended back. Stock HD144/145's matched with twin plates won't allow for that. Some people cut the springs in half...ouch. OTOH...

Galen's solution uses the original HD-8 shroud with the aluminum rings right? Well, if you match the HD-8 shroud to the HD 144/145 body with the existing Barco scheimpflug twin plates you can get 2 mm clearance...PROVIDED the shrouds are properly pushed down on to the HD-144/145 body. I saw this in one of the photos I found online. The HD-8 shroud is pushed so far up on the HD8 body that it touches the front Focus Lock nut.

Curt

[Tom.W]

I have both Galen's modded HD-144 to HD-8 mounts and a set of Bjorn's adapter plates . Galen's adapters are silky smooth when making focus adjustments plus they can can be transferred to any projector that uses HD-8's . What is Galen charging now days ? I't appears Bjorn is no longer in the adapter business .

[dc_pilgrim]

I believe Galen's price is $500/set. I believe he needs multiple orders (3+?) to make it worthwhile from a time standpoint.

[Moose]

Galen recently quoted me a price of $420 but maybe it's more now. I have to do some wheelin' and dealin' first before I will be a proud owner.

[Moose]

[Person99]

[picree]

Same here. As painful as this is going to be, moving the projector is easier than moving the wall!.

Dave-I recently read where you figured out that in order to get full raster usage you calculated that the projector could/should be about 5% closer than the Barco Lens program said. Great-since that's what my little test has shown. But, please confirm one thing. The HD-8's were still well within their range of focus right?

You see, right now, I'm probably two inches farther than the Lens program says...with good focus (at the midpoint of the Focus Lock nuts). I ran out the raster and did a quick geometry calculation that showed I could be a full 8" closer for the same 94" screen. Adding the HD-144's will bring me about another 10" closer still (total of 18"). Sounds like you did something similar. Focus was never a problem right?

Curt

[Person99]

[Chuchuf]

[Spotmatic]

I would rather buy Galen's adapters, but the shipping of HD-145's back and forth from The Netherlands to the USA is rather expensive. Especially because the lenses are large and heavy. Does Galen sell the lenses pre-made? I can send HD-8 lens bases, however.

[Tom.W]

Galen is in the US last I heard ...

[dc_pilgrim]

Yeah, but Spot is in the Netherlands.

You could always buy them from a seller in the US and have that seller ship them direct to Galen, and then only pay the international freight on one leg of the trip. Just a thought.

[Joust]

holy hi-jack!

[zGman]

Greetings and a Happy New Year!

Thanks Tom and Terry, it's always nice to hear some positive feedback!
And yes we are still in the USA - Although Maria was kinda excited about
Alan putting us in France a while back....hohoho!

I often spend too much time fiddling to get things just right, but that isn't
really where the cost occurs in the adaptors - just as Terry pointed out,
there is enough variation between each lens body that every part is
custom made, which takes a lot of time to make measurements and
track tolerances. Plus there is more going on in the adaptors than
meets the eye, and more parts required in addition to the 'rings'.
And it's not so easy to machine large diameter, thin cross-section rings,
especially when both inside and outside diameters have to be accurate
on the first try - there is no "touch-up" possible once they are parted off.

Getting the smooth action is very important, but at the same time there
shouldn't be any 'play' in the mechanism, or the convergence won't be
stable during focus adjustments. There are two different sizes internally
for HD8 bases, and significant variation within the two types, which
makes the fitment process fairly entertaining...

There is also variation between lens types and even the manufacturing
dates which affects the exact placement of the lens with respect to the
tube face, and there is also considerable variation between the Barco
model types.

I have taken the time to measure every parameter and have an
extensive set of drawings so that I can build the adaptors to give the
maximum range of focus - which gives you the maximum range for
throw distances and therefore screen size.

The cost of shipping overseas is unfortunate - I have had a number
of inquiries and have cheerfully referred people to Bjorn....he did
some great work for his solution.

The cost is still $500 per set plus shipping, and we have almost met
the minimum - if anyone is still 'fence sitting' this would be a good
time to jump in. Please feel free to e-mail with any questions.

Also, Barco 8" LC housings are available for anyone interested
in that project, along with the adaptors, modded HD-18 lenses, etc.
This is a well engineered 'bolt-in' retrofit with no chassis mods required.
If you provide the MEC(!) tubes the cost for the complete 8" LC
conversion for Barco 808/1208 is about $1800 plus shipping.

Cheers,
Galen
144lens@bellsouth.net

Thanks to Curt and Kal for the very helpful
and well done website & forum.

[Joust]

[Tom.W]

Sorry my bad ... There is no easy way to do this correctly and Galen has , at least so far , come up with the best and most elegant solution . If you want a standard by which to judge all others this is it .