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		| gulfman 
 
 
 Joined: 04 Apr 2012
 Posts: 3
 Location: norfolk england
 
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				|  Posted: Thu Apr 05, 2012 9:35 pm    Post subject: lamp type |   |  
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				| hi can anybody help i have  bought a , graflex 16mm projector model 821 the lamp is missing i need lamp type volts & any info on this projector. thanks john. _________________
 i like to get old projectors up and running
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		| Henry 
 
 
 Joined: 09 May 2001
 Posts: 1650
 Location: Allentown, Pennsylvania
 
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		| 45PSS 
 
 
 Joined: 28 Sep 2001
 Posts: 4081
 Location: Mid Peninsula, Ca.
 
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				|  Posted: Fri Apr 06, 2012 7:03 am    Post subject: |   |  
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				| Another potential source http://www.donsbulbs.com/
 
 Any chance/hint the 821 is a rebadged make/model by another manufacture?
 _________________
 The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.
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		| gulfman 
 
 
 Joined: 04 Apr 2012
 Posts: 3
 Location: norfolk england
 
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				|  Posted: Fri Apr 06, 2012 12:45 pm    Post subject: lamps |   |  
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				| thanks to all info sent,i think my model is madw by graflex i have a 4pin lamp 21-5v 150w. dont like to fit it till i can make sure its the right volts. the ser No of the projector is 372706.if that helps.john. _________________
 i like to get old projectors up and running
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		| 45PSS 
 
 
 Joined: 28 Sep 2001
 Posts: 4081
 Location: Mid Peninsula, Ca.
 
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				|  Posted: Wed Apr 18, 2012 2:16 am    Post subject: |   |  
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				| If no one responds with a bulb number then: 1. look at the socket for the bulb.  it will have either an index slot in the center of the socket or different sizes for at least 1 of the 4 pins.  The bulb should align so that the projected light faces the lens.
 2. 21.5V - 150W, marked values.
 Power=E (volts) * I (current).
 I=P/E
 I=150/21.5
 I=6.9767 amps.
 
 A lower voltage bulb that is the same wattage will burn out quicker than the standard bulb.
 A higher voltage bulb that is the same wattage will last longer but be dimmer, lower light level output.
 A higher wattage bulb at any voltage will draw more current burning the wiring or any transformer in the lamp electrical system.  DO NOT use a higher wattage bulb.
 A lower wattage bulb will burn brighter and possibly damage film and will burn out quickly.
 _________________
 The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.
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		| gulfman 
 
 
 Joined: 04 Apr 2012
 Posts: 3
 Location: norfolk england
 
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				|  Posted: Wed Apr 18, 2012 9:04 pm    Post subject: lamp type |   |  
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				|  	  | 45PSS wrote: |  	  | If no one responds with a bulb number then: 1. look at the socket for the bulb.  it will have either an index slot in the center of the socket or different sizes for at least 1 of the 4 pins.  The bulb should align so that the projected light faces the lens.
 2. 21.5V - 150W, marked values.
 Power=E (volts) * I (current).
 I=P/E
 I=150/21.5
 I=6.9767 amps.
 
 A lower voltage bulb that is the same wattage will burn out quicker than the standard bulb.
 A higher voltage bulb that is the same wattage will last longer but be dimmer, lower light level output.
 A higher wattage bulb at any voltage will draw more current burning the wiring or any transformer in the lamp electrical system.  DO NOT use a higher wattage bulb.
 A lower wattage bulb will burn brighter and possibly damage film and will burn out quickly.
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 thanks i will fit lamp and hope for the best. 	  | Quote: |  	  |     | 
 _________________
 i like to get old projectors up and running
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