8mm Forum: Eumig 807 D

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Posted by Tony Stucchio (Member # 519) on February 22, 2007, 06:41 PM:

I have old Eumig documenation that says the 807 D takes a 75 watt lamp, yet I see some on eBay that say 100 watt. Did Eumig change the spec at some point? Can you put an EFP 100 watt in a Eumig made for 75 watts? Both are 12 volts. Also see some 802 D on ebAy that claim 100 watts as well.

Thanks

Posted by Michael Scalise (Member # 278) on February 22, 2007, 06:47 PM:

I have the Eumig 810 D...and if I recall correctly it is an EFP 12V 100 watt bulb...which by the way, for me at least, seems to last forever. I only recall changing the bulb once or twice since buying it in the mid to late 70's!

Maybe I just baby my projector...or it could be a case of not watching enough movies! [Big Grin]

Posted by Steve Klare (Member # 12) on February 22, 2007, 07:10 PM:

The nice thing about the Eumigs (and this includes the 810 for certain, I have one myself.) is a lot of them pre-heat the bulb so when you turn it on full the filament is already warm and the surge of current through it isn't so big.

This momentary pulse of power is more abusive to the filament than long periods of steady operation, that's why when a bulb blows it's usually right when you turn it on. By preheating, a lot of the stress is taken out of the equation and the bulbs last considerably longer.

I seem to recall something in the Guiness Book about a lightbulb that had been operating for something over 50 years at a fire department, but then again this bulb was never turned off!

Posted by Paul Adsett (Member # 25) on February 22, 2007, 09:50 PM:

Edison's original light bulb is still lit at his laboratory in Fort Myers Florida, at what, over 100years of running?

Posted by Tony Stucchio (Member # 519) on February 24, 2007, 09:13 AM:

Yes, I've had the 810 D for 33 years and it still works. Curious about the 807 since so many more of these show up on eBay, many of them claiming to be practically new. Any reason why you couldn't use a 100 watt in these if they were made for 75 watt?

Posted by Steve Klare (Member # 12) on February 24, 2007, 09:21 AM:

The circuitry that powers the bulb may or may not be up to the extra power required. If it's not the projector probably wouldn't spontaneously detonate, but probably would fail sooner or later.

Even if the circuitry was up to the task, there could be mechanical compatibilty issues (socket, lampholder) if the only real difference is the projection lamp that Eumig chose. This would be the easiest to figure out since you can find out what the bulbs are and get the specs.

There may also be cooling issues if Eumig picked a different fan to cool the lower power projector. Manufacturers love to shave costs and if they can save 50 cents by installing a less powerful fan where they can get away with it, they'll do it!

..or there may be no difference at all! The best way to know for certain is to have both projectors side by side and figure out what's different.

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