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Author
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Topic: T2 - Re-recording
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Paul Adsett
Film God
Posts: 5003
From: USA
Registered: Jun 2003
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posted February 23, 2007 04:23 PM
Hi Lee,
I share your enthusiasm for the sound quality that can be obtained on the Eumig 938 Stereo. This is the machine I use to re-record all my films, and like you the results are usually stunning, with beautiful rich sound and great stereo separation. I've said it before, but in my humble opinion, the 938 beats the sound quality of the GS1200, and the outboard sound mixing console, with linear pots and beautiful illuminated analog meters, is much better than the GS controls. And as you have noted, the mechanical speed control on the 938 is really very precise, so 'wild' re-recording is quite a feasible proposition if you have just a little patience.
The Eumig engineers did an incredible job when they designed the 938.
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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj
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Lee Mannering
Film God
Posts: 3216
From: The Projection Box
Registered: Nov 2006
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posted February 25, 2007 05:06 AM
Hi Paul. I have posted the reply to your PM here as others may be able to help you more than I.
All the shutter blade conversions I have carried out over the years have been done on machines with limited value just in case I made a mess of it, and not wanting to botch an expensive machine. However, as the Eumig 926 was obtained at very small cost and was in fact new in the box I wasn’t so shy to convert it to two blade. I wanted a good running machine that was stereo, so came up trumps when I was offered this new Eumig and set about converting the shutter blade with a view to using it for my scope shows.
It may surprise some to learn that I did not remove the blade from the machine but converted it in situ. The metal used on this blade is quite soft so it was a simple job to remove the back and front of the machine to gain access. Once inside I covered all the inner workings with cloths and tape in place so as to protect the circuit board. Holding the blade I marked the one that covers the gate aperture as the film is moving down, and this must not be touched. Looking to the centre on the other two I marked a centre spot between the two blades and then cut them off. One blade was then attached between where the two blades used to be and aligned, then temporarily fixed in place with gaffer tape and a film laced up.
I did a short test to make sure it was ok then secured the blade using Araldite resin to both sides. (One side each day) The projector was laid on its side during this process and I did secure the blade edge having laid a ruler along it to check the new blade was straight.
I left the machine for a few days for the resin to go hard and all that was left was for the back and front of the machine to be secured in place once again.
In truth a top job would have been to remove the drive shaft and perhaps rivet the blade on, but this machine was new so I didn’t want to tempt fait!
Now to answer your question.
If memory serves me right the 938 & 940 have a twin shutter blade which closes the aperture a little when running the machine in reverse? Quite what effect altering the mechanism within will have on projection I am not quite sure, but have a very close look around the drive shaft near the blades as I expect some sort of sprung clutch may be used to engage the reverse shutter blade.
The 926GL was the last Eumig to be made as we knew them and very much a lets see what parts we have left to make a projector machine I think. I wrote a article some years ago for the IAC Film & Video Institute charting the rise & fall of Eumig and the many money worries they had in the early 80’s. Fearing collapse they received a large loan from the Austrian bank to keep them going around the time of the 824D model, but it was not long after they folded following the issue of the superb 938 & 940 machines. By the time the 910 models came and went that was about it as video had a firm hold. But machines like the 824D and Stereo models if converted to two blade shutter are great for film projection with two blades, and my 824D has also been adapted to two blades for standard 8 use and has worked well. Hope all this info helps..
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