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Author
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Topic: Upgrading projector - Advice
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Osi Osgood
Film God
Posts: 10204
From: Mountian Home, ID.
Registered: Jul 2005
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posted April 06, 2016 11:49 AM
Ahhh, brightness, I didn't read every post as sharply as I should have ...
Though I must say, in the case of some of the top models out there, you are sometimes paying more for the name brand than the quality level (though I have heard a lot of good about that "B" brand projector), and can't some of the smaller models take different lamps to increase they're light output?
I don't know if that is the case with a Eumig, as I've never tried, I have a big enough screen and the light output is just fine with my projectors. ![[Smile]](smile.gif)
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"All these moments will be lost in time, just like ... tears, in the rain. "
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Osi Osgood
Film God
Posts: 10204
From: Mountian Home, ID.
Registered: Jul 2005
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posted April 07, 2016 12:33 PM
Paul ...
How would you change that, as I have the 926, and I wouldn't be surprised that, as a general rule, they are quite similar in design within.
But this brings up a question ...
I have noted that I get an extremely long life out of my lamps on the Eumig 926, far longer than the usual 25 or so hours, and perhaps this can be because it's not at the 15 level and just a little lower?
I really don't understand this part of projector tinkering and all, so you're advice and expertise would certainly help.
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"All these moments will be lost in time, just like ... tears, in the rain. "
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted April 07, 2016 02:03 PM
Paul, I think we had this conversation in the past on here regarding the voltage settings on the S938.
All I can remember here for the time being is it is set at the optimum safe setting to maximize the lamp output. I cannot remember the tappings on the transformer primary, but whatever I could safely run it at, will be the setting I used. Either 240v or 220v.
Osi, you have to be careful not to over excite the delicate electronics on projectors like a 926 or 938. There is a lot going on in there and much of it needs to be receiving the exact correct voltage and though + or - 10% of the rated voltage, maybe tolerated from the secondary windings for most of the electronics, it's not worth stressing any part of the circuit unnecessarily at the age these machines now are.
I try to limit any over excitation of these lamps to no more than 15.2v myself, to ensure the above applies to the rest of the circuit's.
Wherever it's at (and I know it's very close to 15v), it falls a long way short of the image brilliance gained from either of the 610's I have. Or for that matter the ST 1200 I still have.
Obviously the Beaulieu, with all of its advancement in design plus a 2 bladed shutter, is out there in a league of its own by comparison to any other 15v halogen machine I have.
Equally Osi, referring to your earlier points raised here, projectors are not like Nike T shirts, where the same T Shirt can be manufactured in the same Chinese factory but the one with the tick sells for ten times more than the one without!
Projector brands and model reputations were only ever built up by user experience, not fashion statements.
No one ever thought the GS 1200 was the greatest Super 8mm Projector ever built until they used one.
Not even the legendary Ivan Watson!!
By the time any electro mechanical device carries a "brand name" as its reputation, it's been a very impressive device in use, to gain one!
[ April 07, 2016, 04:41 PM: Message edited by: Andrew Woodcock ]
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"C'mon Baggy..Get with the beat"
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Phil Murat
Jedi Master Film Handler
Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015
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posted April 09, 2016 04:48 AM
Hi Miguel , Andrew,
What I can see through the picture is a Twin Teeth claw, more probably former generation (Black Appearance) because the last one made by Beaulieu has a different treatment with yellow or gold apperance.
Miguel, if you bought a Beaulieu 708 EL Stereo with unknown background, I suggest you to replace as preventive action, both Main Capacitors (4700µf / 63V , 2200µf / 63 V, very common, easy to find).
As a 2nd Preventive Action, renew Thermal Compound for the 3 Power Transistors and STK Power Amplifier.
Anyway, a Beaulieu 708 properly maintained is like a Truck considering the mechanical systems......
Check the Rear Hub Torque : has to be trimmed to 600gr/cm to avoid future extra wears of gears which are plastic made material (unfortunately......).
Avoid rewinding your movies using the front carrier (for same reasons).
Beaulieu 708 is "Film Safe" :
- 3 machines tested (Old & New genaration), NO SCRATCH REPORTED EVEN ON THE EDGES !!! (Rollers modified or not as well)
- If the Motors Drive Regulation operates normally, NO BROKEN AND/OR FILM JAM EVENTS TO REPORT (Otherwise, if Regulation is faulty ====> Film jams immédiatly , and damages appears!!!).
Each Time you Power Up the machine, insure the régulation works like this (No Film loaded) :
1)Once, set the Main Knob on "Sound" and Push backward the "Loop Sensor" ===>;
-Speed decrease Up to 21 Fps approx
- Full Speed is something like 27 fps
- Medium position is 24 fps.......approx
2)Sometimes, watch "Loop Sensor" during Machine opération (and pay attention to Motors Sound) ===> Loop Sensor has to be steady. If not, there is something wrong (Film or Machine.....)
Phil
[ April 09, 2016, 09:19 AM: Message edited by: Phil Murat ]
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Phil Murat
Jedi Master Film Handler
Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015
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posted April 10, 2016 04:39 AM
Hi Miguel,
Checking Sereo Models, there is no screw in this area, and no hole too.
Backside is the Main Motor Cradle.
Try to get anymore Pictures.
An other point to check is the 4 Nylon "Heads Press Skates" (Reading & Monitoring Heads) :
- Set Main Knob in "Sound" Position (Film loaded) and check clearance between retainer rings and holder. low is the clearance and worner is the skate........
It could be interesting you get a close picture of this condition.
Let me know.
Phil
Is it the "Beaulieu 708 EL STEREO" I have seen on "Le Bon Coin" for 1000 Eur with external High Power Lamp Bus Box?
It was a projector modified by a compagny specialised in Beaulieu Customisation (High Power Lamp, HTI, etc......)
If you want a HTI Power lamp , you can Get modification using a Former "Light Box" (Used for Borescope industry or Medecine).
Now , you can find on "Le Bon coin" (Professionnal page).
However there is NO U/V FILTER in these boxes, so you ll have to find it in an other way.
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Miguel Gimenez
Film Handler
Posts: 52
From: Grenoble, France
Registered: Feb 2010
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posted April 10, 2016 06:22 AM
Well, this is not my Beaulieu (in case there is a misunderstanding), is the one in sale in eBay posted by Alan. The seller has published in eBay also an image of the other side (without the cover).
By the way, after the first contacts with the seller, in my opinion it is not worth to deal with him:
The announce is mainly attractive because of price and the photos which are taken with studio-standard light, but the description, if you read carefully, says almost nothing of importance, and it sounds to me as the typical chatter of a "used-car seller". I can't believe he is an enthusiast of Super 8 seeing the description that he does.
Additionnaly I strongly doubt he says the truth about the origin of the PJ or the reasons for sale: only looking to the amount of items he is selling normally...
Moreover, judging by his replies, I'd say he is a very good candidate for the most ill-bred and pathetic german seller I have ever dealed with (and I have dealed with a LOT of german sellers in eBay and outside, for more than 15 years).
Add to it, that he does not accept PayPal, and we have the typical "eBay bully" profile. BTW, personally I learnt not to consider eBay votes as a guide, never.
Frankly, I can't have confidence on this seller neither the condition of this projector. My feeling is that he tries to sell off a projector that has arrived to his hands, God knows how, not telling all the truth and using a starting lower price as carrot.
Maybe someone can have a different interpretation, though.
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On other side, thank you Phil for the checking advice. I'll take it into account.
About Le Bon Coin, I have been searching there without success for more than a week. Have you found one there ? What do you mean by 'professional page'? Is a part of the site different from the normal one?
I am not too interested in HTI, mainly because the lamp color temperature (color tone), but why not, if it is posible to put a standard halogen lamp, and I have the luck to find it for a non-HTI price, then I could consider it.
[ April 10, 2016, 03:57 PM: Message edited by: Miguel Gimenez ]
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Phil Murat
Jedi Master Film Handler
Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015
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posted April 10, 2016 08:32 AM
Hi Miguel,
Considering "Le Bon Coin" , I found recently "exactly" what I was looking for, I mean a 708 EL Mono in "médium condition" but working pretty well for 80 Euros........
Do not choose a HTI Model as you'll be charge a lot for a low improvment (Exept for Lamp life , 3000Hrs Approx, This is my own opinion).
1000 Eur (Any 708 Stereo version) is a correct price for a machine showing a pretty good condition.
Moreover ask the seller to send you any pictures ("Sharp" pictures) you like concerning specifics points as you can imagine.
At the end , call him at phone, and how the conversation sounds, as 1000 Eur is "Money", trust in your own feeling (this is a psychological game)
Be Patient.......
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Luis Caramelo
Master Film Handler
Posts: 494
From: Funchal
Registered: Feb 2011
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posted April 10, 2016 09:33 AM
Andrew is right,it,s a nice model the chinon st-1200,i got mine over several years.still o,k.i the easy clean of the sound head,the image stands like a rock,i got na external amplifer,witch gives a good stereo,the only but i found it,s not easy to fixed a scope lenses.
luis caramelo
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