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TOPIC: sound trouble

sound trouble 21 Dec 2003 20:21 #21726

  • jholliger
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Having trouble with high pitch sounds in "Return.." picking up a warrble.. checked and replaced bad bearings on scanning drum also tighted the timing belt... fixed the problem but wanted to know which actually fixed it?? Owner says bearing... I say timing belt...
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Re: sound trouble 22 Dec 2003 13:28 #21727

  • John Pytlak
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Wow and flutter in analog sound is most likely due to slight variations in the speed of the scanning drum, so I'd agree bad bearings were the most likely source.

John P. Pytlak, Senior Technical Specialist
Customer Technical Services
Entertainment Imaging
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: +1 585-477-5325 Cell: +1 585-781-4036 Fax: +1 585-722-7243
E-Mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Website: http://www.kodak.com/go/motion
John P. Pytlak, Senior Technical Specialist
Customer Technical Services
Entertainment Imaging
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: +1 585-477-5325 Fax: +1 585-722-7243
E-Mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Website: http://www.kodak.com/go/motion
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Re: sound trouble 22 Dec 2003 14:01 #21728

Timming belt tension on a christie or a Vic 5 projector can cause flutter as it flaps there is speed variations occuring
On the christie as the pulleys get undercut the belt tension introduces a harmonic vibration that is picked up
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Re: sound trouble 22 Dec 2003 18:43 #21729

  • Ken Layton
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You didn't say what make and model the soundhead is.
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Re: sound trouble 22 Dec 2003 22:41 #21730

  • jholliger
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Ballantyne model VII
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Re: sound trouble 23 Dec 2003 01:29 #21731

  • Ken Layton
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Did you replace the scanning drum shaft with the bearings? If not, you will be shortly! The bearings on the scanning drum shaft usually chew up the shaft too.
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