8mm Forum: Help With Arc Lamp Wanted!

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Topic: Help With Arc Lamp Wanted!

Simon McConway
Phenomenal Film Handler

Posts: 1085
From: Doncaster, UK
Registered: Jun 2004

posted June 10, 2004 04:21 PM

I realise that this is really an 8 mm forum but wanted to ask for help regarding a MARC 300 lamp in a B & H 16 mm projector. Just bought a new lamp and installed it. It worked perfectly for about an hour last night. On striking it tonight, it lit but went out after 5 minutes and seems to be refusing to restrike at all. Checked all of the obvious things; fuses, connections etc. all ok. Any advice as I realise some of you may use arc lamps in 8 mm machines such as the GS1200 Xenon. Any help gratefully received. Thanks. Simon.

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Michael De Angelis
Phenomenal Film Handler

Posts: 1261
From: USA
Registered: Jul 2003

posted June 10, 2004 06:51 PM

Hi Simon,
Welcome aboard.
I do not have an answer to your question,
but it is good to ask it here.

If there is not anyone here for a reply
you may wish to also try the www.16mmfilms.com
forum.

Best.
Michael

--------------------
Isn't it great that we can all communicate about this great
hobby that we love!

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John Clancy
Phenomenal Film Handler

Posts: 1954
From: Cornwall
Registered: Jun 2003

posted June 11, 2004 02:12 AM

I've had a similar problem with one of these lamps. After 14 hours of use it wouldn't strike. Fortunately I have a variable power supply and cranking this up to full got it to strike and gave me about a further 80 hours.

It could be that not enough power is getting through. Can you try the lamp in another machine? Do you have another lamp to try?

--------------------
British Film Collectors Convention home page www.bfcc.biz. The site is for the whole of the film collecting hobby and not just the BFCC.

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted June 19, 2004 06:09 PM

Hi Simon, How many hours has the lamp done so far? Maybe its at the end of it's life and what John said about cranking up the voltage may work. Maybe knocking the voltgae selector from the 240V position to the 230V position may get it to strike?

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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Simon McConway
Phenomenal Film Handler

Posts: 1085
From: Doncaster, UK
Registered: Jun 2004

posted June 20, 2004 04:24 PM

Thanks for the advice; The lamp (G E MARC 300) was brand new. The fault is in the power pack, which sits underneath the B & H 666. I know this because the lamp strikes perfectly in another machine. The fault is with either the large capacitors or the bridge rectifier, but probably the caps. Anyone know of a cheap large voltage capacitor supplier?

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted June 20, 2004 05:41 PM

Try RS Components as they have a fairly large range of capacitors.

http://rswww.com

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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