8mm Forum: GS 1200 sound problem

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Topic: GS 1200 sound problem

Melvin England
Jedi Master Film Handler

Posts: 707
From: Hull, East Yorkshire, UK
Registered: Feb 2016

posted January 07, 2017 04:39 PM

I recently finally became the proud owner of an Elmo GS1200 after all these years. I have set it up and have run a few films through it, but it has just one problem.... the volume is at one level....FULL BLAST.
I turn the twin volume knobs down, but that has no effect. Am I overlooking something here? I am still getting to grips with the machine and wondered if there was some kind of over riding volume pre set I need to de-activate, or do I have a real problem? If so, does anyone have any advice or a solution,please?

.

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted January 07, 2017 04:42 PM

Has it been used regularly before you got it Melvin?
Especially recently?

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"C'mon Baggy..Get with the beat"

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Melvin England
Jedi Master Film Handler

Posts: 707
From: Hull, East Yorkshire, UK
Registered: Feb 2016

posted January 07, 2017 04:57 PM

Andrew - From what I can gather, it was used quite often until maybe 2 years ago. I first cranked it up about 6 months ago and spotted the problem, and it has taken me until now to send this plea for help.
I watched my first optical film on it tonight ( "Little Shop of Horrors") and listened to it through a radio headphone so I could lower the volume enough to hear it. It is the same with magnetic sound.

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted January 07, 2017 05:14 PM

It sounds as though the pre amp is in some way being bypassed.
A common problem with ALL the Elmo range apparently, is that sometimes the push button switches like the record button etc can become oxidized from lack of use.

Try plugging a 3.5mm Jack into any relevant orifice several times and the same for headphone socket etc using a 6.3mm plug.
Then try pressing in and out the buttons associated with the pre amp stage of the amplifiers like the record button etc.

See if this makes any difference first of all Melvin.

If not you can go a step further with some switch contact cleaner if necessary and even checking for dry joints etc, but this method of trial and error has often solved many issues when the projector hasn't been used for a while.

Don't be afraid of carrying out these actions several times fairly vigorously.
You won't do any Damage but may well solve a bad connection just from this action alone.

Obviously do all of this with the machine powered down and see how you go Melvin.

The fact you apparently have full output from both tracks is encouraging. It's unlikely to be a fault on the volume control pots themselves then.

If this takes you nowhere Melvin, try contacting Bill Parsons for a little advice.
There is nothing Bill hasn't witnessed on these machines apparently and he would probably be able to tell you what it likely is in an instance just from seeing these type of issues many times previously.

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"C'mon Baggy..Get with the beat"

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Melvin England
Jedi Master Film Handler

Posts: 707
From: Hull, East Yorkshire, UK
Registered: Feb 2016

posted January 07, 2017 06:12 PM

Thanks for the advice,Andrew. I will give it a try and let you know how I get on.

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