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The things we take on as motion picture enthusiasts...
All of my equipment projects were just about completed other than a 9-5 sound projector I'm upgrading so I needed a new project then what rolled up a 16mm RM1 Elf from a farm. It was covered in muck both out and in so I stripped most of it down and just about all back together, lubricated, couple parts replaced and being an earlier Elf these didn't have a internal loud speaker. Have fitted a few over the years to the earlier models and this is how I do it.
The amplifiers in Elf/Eiki projectors do blow and I will also tell you how to stop that happening to yours for what is usually the main reason, at least in my experience.
The first thing to do is remove the back cover as it will give you better sight of where you will be working. Remove the flywheel and the amplifier all Phillips screws and two plugs to clear. Remove the amplifier and give it a wipe over as it will probably be covered with dirt. On the side you will see a Jack Plug Socket to unscrew. Be careful as it sits very near components at its rear but it is possible to remove it without taking the whole circuit board out.
You will see a un used terminal on the socket this is you + terminal connection to solder a wire onto. The - is at the front typically a green wire.
Solder some decent speaker wire onto it I used a short length of QED laying around.
Now then. Before you rush to refit the Jack socket wrap a short length of insulation tape round the terminals to project against shorting. Also bend the small mounting plate slightly forwards by hand before refitting the jack socket. Elf made a bit of a design flaw here as over the years of a plug being usually over pushed it bends the plate back and shorts the Jack terminals on electrical components very near to the terminals. You will see what I mean if you tackle the job.
When the socket is refitted reassemble feeding the cable in a clear path away from moving components.
You will need to choose a suitable internal speaker and where you want to locate it. I usually glue it in the top of the rear cover and solder it up. Leave time for glue to set and this avoids spoiling the case and is reversible if you ever have to change to a different speaker.
Of course when you plug in a external speaker it will mute the new internal one and its a relatively easy upgrade to one of the older machines such as this RM. I've yet to fit the new speaker in as I'm still finishing the rebuild but I will add a picture when complete.
I may pop a split photo Diode in this one for Stereo on newer prints but that's for another day..
All of my equipment projects were just about completed other than a 9-5 sound projector I'm upgrading so I needed a new project then what rolled up a 16mm RM1 Elf from a farm. It was covered in muck both out and in so I stripped most of it down and just about all back together, lubricated, couple parts replaced and being an earlier Elf these didn't have a internal loud speaker. Have fitted a few over the years to the earlier models and this is how I do it.
The amplifiers in Elf/Eiki projectors do blow and I will also tell you how to stop that happening to yours for what is usually the main reason, at least in my experience.
The first thing to do is remove the back cover as it will give you better sight of where you will be working. Remove the flywheel and the amplifier all Phillips screws and two plugs to clear. Remove the amplifier and give it a wipe over as it will probably be covered with dirt. On the side you will see a Jack Plug Socket to unscrew. Be careful as it sits very near components at its rear but it is possible to remove it without taking the whole circuit board out.
You will see a un used terminal on the socket this is you + terminal connection to solder a wire onto. The - is at the front typically a green wire.
Solder some decent speaker wire onto it I used a short length of QED laying around.
Now then. Before you rush to refit the Jack socket wrap a short length of insulation tape round the terminals to project against shorting. Also bend the small mounting plate slightly forwards by hand before refitting the jack socket. Elf made a bit of a design flaw here as over the years of a plug being usually over pushed it bends the plate back and shorts the Jack terminals on electrical components very near to the terminals. You will see what I mean if you tackle the job.
When the socket is refitted reassemble feeding the cable in a clear path away from moving components.
You will need to choose a suitable internal speaker and where you want to locate it. I usually glue it in the top of the rear cover and solder it up. Leave time for glue to set and this avoids spoiling the case and is reversible if you ever have to change to a different speaker.
Of course when you plug in a external speaker it will mute the new internal one and its a relatively easy upgrade to one of the older machines such as this RM. I've yet to fit the new speaker in as I'm still finishing the rebuild but I will add a picture when complete.
I may pop a split photo Diode in this one for Stereo on newer prints but that's for another day..
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