8mm Forum: GS 1200 Track-2 Screeching Noise???

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Topic: GS 1200 Track-2 Screeching Noise???

frank arnstein
Jedi Master Film Handler

Posts: 534
From: Gold Coast. Australia
Registered: Jan 2005

posted March 26, 2019 10:30 PM

I have successfully replaced the 2 arm drive gears which came from Edwin van eck. I can recommend these 3D printed gears to anyone with a GS 1200.

I still have an issue with the sound on this machine and need help to proceed.

When playing normal mono track movies, the sound output is fine.
All the way up to loud.
However, when the volume control for track 2 is turned up just a bit, it emits a terrible, loud screeching sound from the speakers and the recording meter for track 2 slams to full stop during this screeching.
I dont think it is working in stereo as this screech reappears whenever track 2 volume is turned up at all. It is real loud.

So I am uncertain what can be causing this problem with the sound. The machine is a late model and in good shape otherwise.

Hoping some one can suggest a course of action, as I want this noise fixed before my hearing is affected.
dogtor frankarnstein
[Frown]

[ March 27, 2019, 12:11 AM: Message edited by: frank arnstein ]

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At Projector Heaven the Focus is always on Detail.

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[o:/o]<|=- dogtor@projectorheaven.com.au
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Chip Gelmini
Phenomenal Film Handler

Posts: 1733
From: Brooksville, FL
Registered: Jun 2003

posted March 26, 2019 11:02 PM

Is the white record switch turned to the off position?

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frank arnstein
Jedi Master Film Handler

Posts: 534
From: Gold Coast. Australia
Registered: Jan 2005

posted March 26, 2019 11:36 PM

Yes Chip
that record switch has no effect on the noise. I have worked it many times.

The only thing that seems too affect the noise is the volume control for track 2.
When it is turned right down then there is no more noise heard.

dogtor frankarnstein [Frown]

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At Projector Heaven the Focus is always on Detail.

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[o:/o]<|=- dogtor@projectorheaven.com.au
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Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted March 27, 2019 01:57 AM

Sound like you have a short somewhere [Frown]

frank this is all guess work, but have you looked carefully around the sound head wiring? and follow it through to the pre-amp. I have no idea but is there a connector on the circuit board where the wiring from the sound head goes? last I can think of is to give all the switches ESS etc a workout....best of luck

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted March 27, 2019 07:13 AM

Frank, try this take your finger and press down on the record button on the affected side! Turn the record button on! And press down a few times! To see if the noise stops! You see there's a micro switch that works it! They do go bad! If that does not work than its needs cleaning or the micro switch is bad!

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frank arnstein
Jedi Master Film Handler

Posts: 534
From: Gold Coast. Australia
Registered: Jan 2005

posted March 28, 2019 07:16 AM

Hi Graham and Leon and Chip...

Despite working the record switches and buttons earlier on without any success, I decided to try yet again and do exactly as Leon advised. Pressing and sliding the record button and changing tracks. Plus working any other switch and button on the machine.

Nothing seemed to change for a while. I just continued flipping the record switch and track keys until suddenly I realised I could turn up the volume on track 2 without any screeching noise erupting.
Further testing with 2 track sound films confirmed that track 2 was working again at full strength and clear as a bell.

So I am delighted to report that this Elmo GS 1200 is working properly again. Magnificent, clear loud sound in Stereo.

The 2 new 3D printed arm-drive gears from Edwin Van Eck are working fine with no problems at all in the fitting.

This is now a happy day for me and what a fast result by the very experienced resident forum experts. Thanks to Leon, Chip and Graham for your help and excellent advice.

dogtor frankarnstein

[Smile]

[ March 28, 2019, 10:26 AM: Message edited by: frank arnstein ]

--------------------
At Projector Heaven the Focus is always on Detail.

____
[o:/o]<|=- dogtor@projectorheaven.com.au
//``\\
-----------------------------------------------

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted March 28, 2019 11:06 AM

Frank, its good to hear your machine is working fine! Good Luck!

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Dominique De Bast
Film God

Posts: 4486
From: Brussels, Belgium
Registered: Jun 2013

posted March 28, 2019 07:00 PM

Thanks a lot for this thread. A sound problem occured on my gs (bad luck after I had been, again thanks to Leon's advises, able to fix the sharpness). I tried what was described here and it worked !

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Dominique

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted March 29, 2019 09:52 AM

Always glad to help! Keep those machines running!

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Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted March 29, 2019 01:07 PM

Great to have Leon's Elmo expertise and advice available on the forum.

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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted March 29, 2019 03:42 PM

Always glad to help!

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