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lamp type

 
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gulfman



Joined: 04 Apr 2012
Posts: 3
Location: norfolk england

PostPosted: Thu Apr 05, 2012 9:35 pm    Post subject: lamp type Reply with quote

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.
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Henry



Joined: 09 May 2001
Posts: 1442
Location: Allentown, Pennsylvania

PostPosted: Thu Apr 05, 2012 11:44 pm    Post subject: Reply with quote

Try this source: http://www.replacementlightbulbs.com/lampscrossreferenceg.html#GraflexSingerCorporation
Contact them, tell them what you have. They can probably supply you.

Another source: http://www.bulbland.com/default.asp

Google is a wonderful resource.
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45PSS



Joined: 28 Sep 2001
Posts: 3218
Location: Mid Peninsula, Ca.

PostPosted: Fri Apr 06, 2012 7:03 am    Post subject: Reply with quote

Another potential source
http://www.donsbulbs.com/

Any chance/hint the 821 is a rebadged make/model by another manufacture?
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gulfman



Joined: 04 Apr 2012
Posts: 3
Location: norfolk england

PostPosted: Fri Apr 06, 2012 12:45 pm    Post subject: lamps Reply with quote

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.
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45PSS



Joined: 28 Sep 2001
Posts: 3218
Location: Mid Peninsula, Ca.

PostPosted: Wed Apr 18, 2012 2:16 am    Post subject: Reply with quote

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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gulfman



Joined: 04 Apr 2012
Posts: 3
Location: norfolk england

PostPosted: Wed Apr 18, 2012 9:04 pm    Post subject: lamp type Reply with quote

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.
Quote:
thanks i will fit lamp and hope for the best.
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