8mm Forum: Can splices damage sound heads?

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Topic: Can splices damage sound heads?

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted July 17, 2012 07:35 PM

I have often thought that splices could adversely affect the life of magnetic sound heads. After all the film is pressed firmly against the heads and is running across it at a a fair speed. It seems to me that under these conditions a sharp edge of film from a badly made splice could easily nick or damage a head, particulary the very thin track 2 head.

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Hugh Thompson Scott
Film God

Posts: 3063
From: Gt. Clifton,Cumbria,England
Registered: Jan 2012

posted July 18, 2012 04:30 AM

I would think your soundheads are safe enough Paul,as even
though cement splices feel hard,I shouldn't think they'll do any damage
as it is only a form of plastic,which is a lot softer than metal.
It's the constant abrasion of the oxide where the head wear
would come in,and that takes a quite a while.Even then you can have the head reprofiled,and no harm done.

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Lee Mannering
Film God

Posts: 3216
From: The Projection Box
Registered: Nov 2006

posted July 18, 2012 04:48 AM

Hi Paul. My line of thought has always been that poorly made cement splices are like running sand paper over sound heads. The film hits the sound head at quite a rate so with double the thickness of film, plus cement possibly spilling out after joining, and then overlaying mag stripe my guess is cement splices are not the way to go for magnetic sound.

Good tape splices reveal the magnetic track clearly and I have used the Wurker patches for years which are the thinnest of all. Tape is clearly the way to do it and Wurker if well made are near invisible.

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