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» 8mm Forum   » 8mm Forum   » ELMO OPTICAL SOUND PROBLEM

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Author Topic: ELMO OPTICAL SOUND PROBLEM
Thomas Smith
Master Film Handler

Posts: 313
From: Barking, Essex, UK
Registered: Dec 2009


 - posted November 08, 2011 10:49 AM      Profile for Thomas Smith   Email Thomas Smith   Send New Private Message       Edit/Delete Post 
i have a elmo st 1200hd the problem is background music and sound okay, but main dialogue is muffled and sometimes noisy
this varies on different prints,i have cleaned optical lens
both ends but one was hard to get to,optical bulb has been in
projector since i bought it in around 1977 ?
is the problem that i need a new optical bulb any info thanks

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t.smith

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Osi Osgood
Film God

Posts: 10116
From: #399R K.O.A. Mountian Home, ID. 83647
Registered: Jul 2005


 - posted November 08, 2011 01:14 PM      Profile for Osi Osgood   Author's Homepage   Email Osi Osgood   Send New Private Message       Edit/Delete Post 
It might actually be the fault of the optical soundtrack as well. While some are rock steady in thier performance (I speak of the soundtrack), others can have a lot of pop, hiss and others fault in them.

Now, some of that can be cured with a very good cleaning of the film. Since the optical track is printed on, as is the film image, there is no harm done with a really good cleaning. Those optical tracks will make very clear each and every bit of dust that happens to find it's way onto that optical track.

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"All these moments will be lost in time, just like ... tears, in the rain. "

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Thomas Smith
Master Film Handler

Posts: 313
From: Barking, Essex, UK
Registered: Dec 2009


 - posted November 08, 2011 03:55 PM      Profile for Thomas Smith   Email Thomas Smith   Send New Private Message       Edit/Delete Post 
hello osi i will try that but i dont think all films would need
cleaning ? i will also try a new optical bulb thanks

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t.smith

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Winbert Hutahaean
Film God

Posts: 5431
From: Nouméa, New Caledonia
Registered: Jun 2003


 - posted November 08, 2011 04:39 PM      Profile for Winbert Hutahaean   Email Winbert Hutahaean   Send New Private Message       Edit/Delete Post 
Hi Thomas, did you hear the sound like people speaking in the water??

if so you have the same problem with me here:

http://8mmforum.film-tech.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=006402#000003

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Winbert

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Thomas Smith
Master Film Handler

Posts: 313
From: Barking, Essex, UK
Registered: Dec 2009


 - posted November 09, 2011 06:22 AM      Profile for Thomas Smith   Email Thomas Smith   Send New Private Message       Edit/Delete Post 
hello winbert yes does sound as if under water have you found
the fault with your projector ? i will buy a new optical lamp
and clean optical lens and films if problem continues i will
stick to mag super 8 films

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t.smith

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Winbert Hutahaean
Film God

Posts: 5431
From: Nouméa, New Caledonia
Registered: Jun 2003


 - posted November 09, 2011 06:42 AM      Profile for Winbert Hutahaean   Email Winbert Hutahaean   Send New Private Message       Edit/Delete Post 
Thomas my projector shows that only for certain films. So I guess the optical lamp need to be re-aligned. But I don't bother because I don't have that many optical films and moreover magnetic sound is more superior than optical.

cheers,

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Winbert

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Osi Osgood
Film God

Posts: 10116
From: #399R K.O.A. Mountian Home, ID. 83647
Registered: Jul 2005


 - posted November 09, 2011 01:55 PM      Profile for Osi Osgood   Author's Homepage   Email Osi Osgood   Send New Private Message       Edit/Delete Post 
Thomas, try to things ...

1. View the film as it passes through the optical lense area.

a. Is the optical lense "flickering" (like a flame?), that could mean that it is indeed getting neqar to expiration.

b. If the lamp's burning is steady and rock on solid, does the film, as it passes over the optical lamp, vibrate? (have a bend?). That is, is the passage smooth over the optical lamp or a "bumpy ride"?

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"All these moments will be lost in time, just like ... tears, in the rain. "

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