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Better than new DIY conversion of a Super 8 projector
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- เผยแพร่เมื่อ 25 ก.พ. 2023
- Movie night! With some Super 8 movies I scored at the flea market. I discovered my trusty Bell & Howell Autoload projector’s lightbulb was burned out. In my experience with old projectors, if you are lucky enough to find the replacement lightbulb, there is no guarantee it will work, most of the time is cheaper to buy another projector. Oddly enough, Walmart sells a replacement lightbulb for CAD$165, probably 8 times the amount you would pay for a projector like this at a flea market (link below). I decided to convert it to LED. Not only works, but also produces way less heat. I could run it without the fan if I wanted to. Sorry about the focus in some of the shots, I was wearing a headband mount and this video was shot in the spur of the moment, this is TH-cam anyway, no budget for focus puller, right?.
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Links:
G9 base bulb socket
www.amazon.ca/...
G9 LED lightbulbs 6000K
www.amazon.ca/...
G9 LED lightbulbs 3000K
www.amazon.ca/...
Original incandescent lightbulb
www.walmart.ca...
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Nice job. The only major issue I can see with this is that the bulbs that projectors normally use emit a very wide range of frequencies (broadband). LED's don't do that.
LED's are 'narrowband' and have a very distorted colour output which may be predominantly Blue (Cool) or Red (warm). Even 'Neutral' or 'Daywhite' LEDs will have a distorted colour output.
This means that certain colours in your projected image will be very strong or very weak depending on the choice of LED that you used.
With that said, though, if you are happy with the way the image looks then that's fine too.
The distortion you are referring to is barely noticeable, the CRI of these LED bulbs is close to 90. In any case, most super 8 films are old (some are 50yo +) and have lost some of their original lustre, especially on the reds. This is not meant to work as a telecine. Thanks for your comment.
Something else was in the room with you. watching you!
I'm Glad my Elom K110SM silent film projector and Eumig 820 sound projector uses GZ6.35 sockets so replacement is easy to get. The Bulp is an Osram 64627 Xenophot I use which produces a pretty white light instead of warm or cold.
As well as using much less energy and avoiding the potentional of throwing away an otherwise working projector we eliminate the 'nightmare' of the film frying if it sticks in the gate. That said, theoretically, I think, films are meant to be good for projecting some 300 times so might consider a digital conversion at least as a back-up? Nothing lasts forever!
True, then you get into the conundrum of digital file conservation, a very complex can of worms in itself. I worked in tv for many years and I can tell you decades of videotape are lost forever and digital archives are also at risk of disappearing, they have to be copied ever so often and not everyone (the people with $$) sees value in them.
Agreed! I think that some years ago one TV program dedicated to this subject concluded that the longest lasting storage might be via B&W film. Yes, video tape sheds oxide, DVD printing ink can corrode the aluminum film etc, etc.@@TheObsoletian
In 2083, this LED bulb will die during someone else's movie night, and they also will have to replace the socket for a new type of bulb)
Someone will replace the LED with a neutrino powered light source, no worries.
Great replacement, but I'm concerned about efficiency. I have experience with a somewhat similar upgrade in some old 2000-s LCD projectors, and the thing is they all have the lamp which produces a narrow beam of light. It seems like the original incandescent lamp of this projector has the same property. So I think it would be much more efficient to use small LEDs like 10 watts Cree XM-L T6 placed in the focal plane of the convex lens. Such approach yields a narrow beam of light somewhat similar to original lamp. There are some videos on TH-cam where people implement such solution and results are good.
Great upload! 😎
Thanks for this!
What would you suggest the LED should be - warm or cool white LED?
Either would work, I used daylight balanced 6000K (cool white)
Mercury halide might work too!
What size light bulb did you use? Great video I am going to do this to my Kodak Brownie 500 watt movie projector. I was going to try and mount an led flash light till I saw your video. Thanks for posting.
It's a 6W, 60W equivalent, links are in the information below the video. Thanks for your comment!
Thanks for getting back to me. I am off to local hardware store, tomorrow hope I am successful if not Amazon.
Wow great video! Would this work on any older projector? I've got a viewplex and a bell and howell that I'd like to convert to led and I have no idea if this would work
I don't see why It would not work on most projectors. Thanks for your comment. Good luck!
Anyway you could build a kit to do this?
Хорошая модернизация, если штатную лампу уже не выпускают