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Topic: Eumig 824 Head needed
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Maurizio Di Cintio
Jedi Master Film Handler
Posts: 977
From: Ortona, Italy
Registered: Jan 2004
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posted May 24, 2014 05:05 PM
Barry, what problems are you experiencing? Keep in mind these heads ARE flat (I mean the very part with the gap coming in touch with the stripe) and when they wear, there forms a sort of recess and the stripe to headgap contact is less consistent but still acceptable under many respects, especially if you just use your machine for a check. Plus there is a way to avoid unnecessary head wear when running silent films, by locking the frame which the pressure pad assembly is fastened to, so that it won't move upwards when the machine is in FWD mode: if you look at the innards (lamp side, downward) you'll find it's self-explanatory.
As for getting a spare, indeed I do have one I might want to part from: fact is I bought it new many years before internet made it so easy (and cheap) to replace a projector needing spares with another identical unit for a cost that is often inferior to the cost of a spare. Believe me these soundheads have always been veery expensive so I am very reluctant to offer it for sale, not to mention the fact that sooner or later I may regret having sold it. So at the end of the day the best thing would be for you to find one at some repair center. Perhaps the last resort might be the Salzburg-based Firm(a) Helmut Mayrhofer: they purchased the whole Eumig spares inventory when the Austrian manufaturer went bankrupt. They are on the internet try some googling. Best of luck.
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Maurizio
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Paul Adsett
Film God
Posts: 5003
From: USA
Registered: Jun 2003
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posted May 24, 2014 08:33 PM
I also have a spare 800 head, but I will not part with it as I may need it downstream for my Eumig 820 Sonomatic.
As for head wear, Maurizio offers a great tip for Eumig 800 series owners to eliminate head wear when running silent films.
Even better is Maurizio's tip for Eumig 900 stereo series owners, which he posted several years ago. Namely to use a spare pressure pad assembly with the track 2 finger cut off when projecting mono films, which for most people is 95% of the time. This eliminates all unnecessary wear on the narrow track 2 head.
I did this as soon as I read Maurizio's post, so I know my track 2 head is like new. ![[Smile]](smile.gif)
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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj
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Barry Attwood
Phenomenal Film Handler
Posts: 1411
From: Enfield, U.K.
Registered: Aug 2003
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posted June 03, 2014 03:37 AM
Yes, they literally replace the worn head, I don't know how it's done, but I've heard that the results are very good, there are 2 specialist companies here in the U.K. doing this kind of work, one even has a website Summertone Ltd. , the other company is called Head Technology but only has a phone number (01784 256046), I've not used either yet myself, but I've let John White know about them and we'll go from there.
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Maurizio Di Cintio
Jedi Master Film Handler
Posts: 977
From: Ortona, Italy
Registered: Jan 2004
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posted June 03, 2014 02:22 PM
Andrew, the way you described it sounds more like a "resurfacing" than relapping. The latter makes me think of something that is added to the head in order to restore its original shape. Somewhat like curing a cavity on a tooth.
Instead what you describe seems to imply the side portions of the head are eliminated so that the surface is flatter. But this will not increase the head's life. All in all I think such a process is much more useful with sound recorders' heads: in this case tape wear digs into the head surface and when the gap is more recessed than the tape's thickness, tape to head contact worsens and the sound output tends to suck. But the sound head is still there (slightly recessed), its gaps almost intact and if these can be put on the same surface as the sides of the sound head (the ones which don't ever come in touch with the tape and are not affected by wear), the head is still perfectly usable.
In projectors' sound heads, instead, wear is a completely different matter with completely different outcomes. This is because the gaps are not incased in the head body but do protrude about 1mm in order not to have the rest of the head come in touch with the film base (image area) since this would be detrimental to the film. It goes without saying when one of the gaps are gone... it's gone and no rectification would help. Unless it is actually possible to add some magnetic alloy to what remains of the original "gap".
I do not doubt the two above mentioned companies are making a profit out of this activity, but I doubt they are applying their process to projectors' sound heads, rather than to regular audio recorders' heads.
Of course my reasoning loses its effectivity IF the process consistes in adding magnetic alloy to the worn-out gap. And I hope it's the case...
Please keep this post updated...
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Maurizio
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