silver_surfer
Nov 6 2006, 06:36 PM
QUOTE (arizonavideo @ Nov 6 2006, 07:08 PM)
Most of the lamp makers list the non true RMS power figures for the power of the lamps so if you have there ballast and use a non true RMS meter it will show 1.8A at 100V the real readings will be lower.
They do this to give the readings that a "avarage" teck would get if they use a standard DVM on the lamp leads.
If you have a non true RMS meter then your readings should be close to the 1.8A 100v readings. The correction factor is .86 for most coil ballast.
well I was part of a long thread about PSU's on a hardware forum, and yeah real power calculation is quite tricky, to say the least
Power Factor and Efficiency have nothing to do, you can have a PFC of 0.99 and still a very bad efficiency of 70%...PFC is actually bullsh*t :
http://www.dansdata.com/gz028.htmQUOTE (FrostMannen @ Nov 6 2006, 06:40 PM)
Hi all, I'm totally new to this. I'm on my way to try to make my own PJ, so this thread has really gotten my attention, I live in Sweden and having hard time trying to get all the basic stuff. But I have soon a 15" Dell 1501FP ( hope it will work ), a old school OHP. So now I'm looking in to getting this Powerball stuff
Keep up the superior stuff Elken...
well starting with a OHP is good but trying to change the lamp system is not that easy.
a while ago I tried to put a 400W HQI into a 360W Halogen 3M OHP and it failed big time......picture was freaking blurry and the thing was melting....
this thing had a very crappy double lens objective with chromatic errors(blue rays appeared for no reason) so good luck, I know some ppl have been more lucky than I was
and yeah Elken, you kick ass
arizonavideo
Nov 6 2006, 07:08 PM
To SS
I was not talking about the power factor of the ballast but why all the lamp voltage and current readings never add to the corect power level.
The .86 is just a fudge factor that (phillips) made up for one ballast /lamp combo.
silver_surfer
Nov 6 2006, 07:28 PM
yeah I get your point buddy
but anyway I think I'll go with the PTU150 eballast, and maybe there'll be a knob to overclock it
elken2004
Nov 7 2006, 05:05 AM
Ok guys and girls,,, I may have to take a back step,,, as after doing the whole elliptical thing plus numerous other tests, made me revisit the 220 mm condensor fressie, and guess what !!
I have achieved even better results than ever before,,, must be dumb or sumfin.. but then, we learn even more tricks every day,,
so !!!
I eat my own words as far as writing the 220mm off.. yuk that tasted bad,,, used words,, tastes like used cardboard,, oh well
elken2004
Nov 7 2006, 05:27 AM
just another thing for those who say they have yellowish whites,, there is another reason this happens which may have been overlooked
when adjusting the lamp along the optical axis for brightest output, if you are close to the panel you will be in the blue end of projection,, but the brightest is more the other way, but if you just cross that fine line, the image starts to go yellowish,, or too far you get brown corners,, this is the red end of collimation.. but before brown shows, you have altered the white to yellow, it is very subtle..
elken2004
Nov 7 2006, 05:37 AM
results with 220mm condensor
first with three sixty watt lamps faceing screen
last two without
Click to view attachmentClick to view attachmentClick to view attachment
elken2004
Nov 7 2006, 05:38 AM
oh also I used standard BOC for screen to as not to contaminate results
Click to view attachment
Mordeth
Nov 7 2006, 05:50 AM
Can't wait to start mine...
elken2004
Nov 7 2006, 06:36 AM
Daz by the time you read this,, I have gone fully 90 degree,, you know hehehehheheheheh,, total commitment..................
DAZZZLA
Nov 7 2006, 07:12 AM
QUOTE (elken2004 @ Nov 7 2006, 05:36 PM)
Daz by the time you read this,, I have gone fully 90 degree,, you know hehehehheheheheh,, total commitment..................
O-oh
DAZZZLA
Nov 7 2006, 07:13 AM
And are you going to use the glass one or the plastic?
elken2004
Nov 7 2006, 07:29 AM
glass
DAZZZLA
Nov 7 2006, 07:32 AM
QUOTE (elken2004 @ Nov 7 2006, 06:29 PM)
glass
Should be interesting
elken2004
Nov 7 2006, 07:36 AM
ohhhhhhh myyyyyy godddddddd
I have learned six answers and eight new questions, plus solved two big issues hehehehehehehehhehehehehehehhehe
GLOWIES totally understood,, the why's where's and hehehehhehe
elken2004
Nov 7 2006, 07:40 AM
I have blown the xmittance thru the roof
MichaelJ
Nov 7 2006, 08:54 AM
QUOTE
GLOWIES totally understood,, the why's where's and hehehehhehe
Clues would be nice
elken2004
Nov 7 2006, 09:45 AM
well lets see with no rear polariser, just the front one,as in my case at the triplet,, you get some image showing but in a circular fashion,, and this is due to polarised light from your reflector 9because light when reflected polarises) , now before today I had no proof, as i have never touched the rear polar bear ever, well today no poalr bears exsist at all on my panel..
elken2004
Nov 7 2006, 09:51 AM
so what you have is a mixture of polarised and non polarised light all hitting the panel,, so if you think about it, the non polarised is polarised by the first polar bear on the panel, and then recieves angle depandant more light from the reflector which is already polarised at same angle, (but at only sections due to it being circular), this prepolarised light is added to raw light and this is what gives the glowies because it is simply more light in total at certain points of panel....
clear as mud is it not hehehheheheh
simply put there is an imbalance is the universe of optics 101, and us nuts who chase perfection
kunteper
Nov 7 2006, 10:01 AM
QUOTE (elken2004 @ Nov 7 2006, 07:27 AM)
just another thing for those who say they have yellowish whites,, there is another reason this happens which may have been overlooked
when adjusting the lamp along the optical axis for brightest output, if you are close to the panel you will be in the blue end of projection,, but the brightest is more the other way, but if you just cross that fine line, the image starts to go yellowish,, or too far you get brown corners,, this is the red end of collimation.. but before brown shows, you have altered the white to yellow, it is very subtle..
yes I second that without any technical explanation what so ever
, I thought it was because the 330 lens was too close to the LCD ...
From my
plogQUOTE (kunteper @ Nov 5 2006, 10:34 PM)
This is one of the first ever projections from the PJ ... not great is it ... I was pretty bummed out. The circle is a washer placed on the LCD and 630 fresnel. I was checking the alignment...
MichaelJ
Nov 7 2006, 10:02 AM
I did notice that the reflector was making the glowies worse... but my glowies are bad even with no reflector :angry:
Didnt you have a theory about undersized frezzies being the cause?
elken2004
Nov 7 2006, 10:08 AM
yes they cause it to, thru edge difraction,,, but also the panel is another cause too, thru edge difraction, of polar and glass, more visible on left and right sides, these are hte most extreme angles of light.. apart from the corners..
elken2004
Nov 7 2006, 10:09 AM
nearly forgot,, answering last post,,,,, the panel is so cool now without polar bear,, its not even luke warm..
elken2004
Nov 7 2006, 10:19 AM
ok shortly two pics to show how polar bears effect colour temp too,,
yes this may suprise you, but it also explains why I have said since last year that, never cut your polar bears exact,, there is at least 5 degrees variation to suit correct colour rendering temperature,, mmm thats what I said,,, there is more to heaven and earth than you realise..
said with tongue in cheek
elken2004
Nov 7 2006, 10:52 AM
here
Click to view attachmentClick to view attachmentoh PS that dark shadow in left (oops right corner) corner,, is my chopstick,,, holding polar bear in place on the precondensor,,
kunteper
Nov 7 2006, 11:14 AM
QUOTE (elken2004 @ Nov 7 2006, 12:09 PM)
nearly forgot,, answering last post,,,,, the panel is so cool now without polar bear,, its not even luke warm..
well the question now is how do you get an image without the polizers ?
elken2004
Nov 7 2006, 11:15 AM
elken2004
Nov 7 2006, 11:17 AM
you can delete the first polar bear,,, but you need to provide polarised light evenly to the panel,,,,,, out of our DIY budgets
elken2004
Nov 7 2006, 11:18 AM
Silver,,, note that very top blue,,,, yours is more cyan, I have noticed,, ??? begs an interesting question as to why...
hendo*AU*
Nov 7 2006, 11:22 AM
Hey Elken finally ordered my polar and recieved it yesterday, i put it on last night....... Looks as if it's fate..... and is so well timed to join in with your fun and games,,,,,, so my question is "can i come too?"
BTW really happy with results..... be showing off most of today
P.S. more explanation is needed but i know you'll get around to it soon enough.
~oh my god it's jackie chan~
elken2004
Nov 7 2006, 11:25 AM
oh I forgot to mention that that colour temp variation in blank screen was due purely to polaristion angle of no less than 2 degrees, and still well within good contrast range too
elken2004
Nov 7 2006, 11:27 AM
in this sp[ace,, is a missing pic of that polar (hot) bear>>>>
Click to view attachmentClick to view attachmentClick to view attachmentohhh there is a stealth display on that panel too,,,,,,, ya cant see it..
kunteper
Nov 7 2006, 11:41 AM
QUOTE (kunteper @ Oct 20 2006, 02:16 PM)
quote from elken's post:
*******************************************************
triplet based polar bear,,( side note, this seems to give best contrast so far )will run thru a period of time to see for sure
reading 18.3 uW
panel based full size polar bear,,(as good as orig polar,,, but big prob is all specs and dirt show, because at focal plane
reading 17.4 uW
*******************************************************
I still think stripping the back polar and sticking it on the preconderser / after lamp will increase the light output .. The above from elken shows 5% increase, so if removing the back gives an other 5%, in total you'll get 10% which isnt a bad increase ...
Its little gains like this that when added up together makes a big diffrence.
Assume
AG removal 10% increase,
Polar stripping and relocating another 10%,
just playing with the LCD yields 20% !....
QUOTE (elken2004 @ Nov 7 2006, 01:27 PM)
in this sp[ace,, is a missing pic of that polar (hot) bear>>>>
Click to view attachmentClick to view attachmentClick to view attachmentohhh there is a stealth display on that panel too,,,,,,, ya cant see it..
I didnt know what the hell I was talking about btw ...
silver_surfer
Nov 7 2006, 11:41 AM
QUOTE (elken2004 @ Nov 7 2006, 12:18 PM)
Silver,,, note that very top blue,,,, yours is more cyan, I have noticed,, ??? begs an interesting question as to why...
you talk chinese to me, I am teh colorblind
but yeah my blue is definitely not saturated like the red..
BTW I've found the most amazing media player ever : KMPlayer available on KMPlayer.com
it's got the most amazing color engine I've ever seen!!
the colors are vivid as hell, it took off a "grey impression" from the image and the SHARPEN filter with LANZCOS resize in RGB32 looks truly natural and HD....It's like I put a new panel in the box
I've uploaded a good working version on :
http://www.badongo.com/file/1672737the installer is in korean, so make sure to uncheck the 3 spywares it includes during setup :
trust me, you won't believe your eyes
elken2004
Nov 7 2006, 11:50 AM
here is with the rear poalr bear removed and that circular polaring effect, and it caused by my reflector,, some is caused by diffraction within panel too,,, complicated to explain, (two sheets of glass plus black mask and CF filters)
ooops wrong pic
hendo*AU*
Nov 7 2006, 12:05 PM
You've got quite the audience right now..... keep the pics flowing chief
Something i want to ask, but it's right on the tip of my tongue,,,,,,......... L ..... Lama... no........ lassy..... no no that not it.... LUXerISm... Some lux readings would be 'nice'...... or at least you educated guess on the brightness increase %
P.S. was/is this part of the method to increase luxism four fold?? im exited about the prospects of that !!!
elken2004
Nov 7 2006, 12:13 PM
that 'L' word is a curse upon curses, because they are not acurate,,, even my own internal readings with a meter dont always translate to whats shown,,,, i am not gonna get tied into a chase for 'L's cause I dont have time for it,, too many other things too do, and also ""to quote someone else" i have other things to do in life""..
elken2004
Nov 7 2006, 12:23 PM
sorry if others dont agree,,, but what I post is there, and if it inspires others to follow and do more beyond what I have done,, all the better..
I beleive my results have proved themselves, other time, If it had of been tainted by seemly low readings, it would have been ignored long ago,, simply because of that.. simple human nature..
a.taylor
Nov 7 2006, 12:30 PM
ok let me see if i have this right.
reflector (pro?) -> powerball -> precon (what are you using at the moment?) -> polar -> 220mm fres -> lcd -> field fres (cant remember FL) -> pro triplet -> polar.
Correct??
very inspiring i might say, hopping to use one of these bulbs in my PJ and now that you have gone back to the 220mm fres i'm even more optimistic.
Cheers
Andrew
hendo*AU*
Nov 7 2006, 12:34 PM
Sorry about that.... to tell you the truth i dont care about luxies either.... im happy with my pj as it stands and its more the bright enough for me and everyone who has layed eyes on a it.
If i could grab 20%-30% more brightness i wouldn't complain (dont have precon and.... what ever you come up with next)....
Well could you just say whether this mod (alone) has given you a "small + medium + large" in brightness and i'll be more than contempt,,, oh mighty jeebus of the opticalisms
P.S. edited 'Q' was/is this part of the method to increase ('brightness') four fold?? im exited about the prospects of that !!!
elken2004
Nov 7 2006, 12:38 PM
every time I do something radical,, I like the pro's,, but spend a week looking for the con's,, much the same as when i did the pro lens mod, to correct its error of pincussioning,,, there had to be a con somewhere,, well I still have not found it..
elken2004
Nov 7 2006, 12:44 PM
my pro reflector died months ago,
silvered mirror, powerball, 6 x 9 precon, 25mm away polar bear,, then 220mm fressie,, 12mm to next fressie 550mm,, 20mm away 19" widescreen panel,,, then travel at lightspeed to the last polar bear, nestled against the back the triplet,, then 45 degree mirror,, then far far far away in another galaxy, a screen which is BOC,, (mainly for these tests being flat as a tack) over my high gain screen,, temporay covered..
paladin
Nov 7 2006, 12:56 PM
QUOTE (elken2004 @ Nov 7 2006, 06:44 AM)
my pro reflector died months ago,
silvered mirror, powerball, 6 x 9 precon, 25mm away polar bear,, then 220mm fressie,, 12mm to next fressie 550mm,, 20mm away 19" widescreen panel,,, then travel at lightspeed to the last polar bear, nestled against the back the triplet,, then 45 degree mirror,, then far far far away in another galaxy, a screen which is BOC,, (mainly for these tests being flat as a tack) over my high gain screen,, temporay covered..
Q: What's a polar bear?
A: A rectangular bear after a coordinate transform.
elken2004
Nov 7 2006, 01:07 PM
hehhehe nope,, a damn hot bear, especially where he lives now,, and he be hot at both ends too..,,, da only cool thingism ism the panelism
elken2004
Nov 7 2006, 01:15 PM
gawd looking at myself in that pic, was starting to be disturbing,,, phew !!!
and geeez that was my good side too !!!!!
cromaclearcrt
Nov 7 2006, 01:17 PM
Thats better...damn that was ugly ..
.Im sure you really are beautiful.. !!
QUOTE (elken2004 @ Nov 8 2006, 12:15 AM)
gawd looking at myself in that pic, was starting to be disturbing,,, phew !!!
elken2004
Nov 7 2006, 01:22 PM
hey DAZZZZZie,, I wanna crack that outer egg,,, mmmmm
I wanna play with that ballism,, touch it,, stroke it,, light it.... geeeezz its tempting
this poor baby has put up with allsorts of abuse,,, and she keeps on keeping on,, never fails to light my life !!!
geeezz ok guys I do have a new girlfriend,,, so get those low level thoughts outa ya minds,,,, OK !!!!
elken2004
Nov 7 2006, 01:28 PM
ohhhh a side note,, I had to replace my hot polar bear,, he burned his furbies,, twas a little close to the apex of precon,, ummm like 2mm,, so made bigger one, and he lives at least 15mm away now,,
twas funny had an odd brownie in middle of screen,,, twas puzzled till the polar bear burning fur struck my nossie... oops,,
elken2004
Nov 7 2006, 01:39 PM
this just for the big "D"
Click to view attachmentaint I pretty mmmmmmmmmmmm,,,
Durachko
Nov 7 2006, 01:39 PM
Sorry I asked!!!
paladin
Nov 7 2006, 01:46 PM
QUOTE (elken2004 @ Nov 7 2006, 07:39 AM)
this just for the big "D"
Click to view attachmentaint I pretty mmmmmmmmmmmm,,,
Reminds me of the movie "Wrong Turn".