8mm Forum: HTI Lamp and Bauer P8 T400

This is topic HTI Lamp and Bauer P8 T400 in forum 16mm Forum at 8mm Forum.

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Posted by Flavio Stabile (Member # 357) on July 09, 2007, 02:03 AM:

Hello everyone!

I recently bought this projector as a second hand.
The seller assured me that the lamp was new and replaced before delivery to me!
The problem is that after only two hours of working the lamp doesn't work anymore...
I'm not experienced with HTI projectors, but is it possible that I have damaged it in only two hours?
Please note I projected a two reels movie (about 50 minutes per reel) and I switched off the lamp between the two showing (i.e. while rewinding the first reel).
At the end of the 2nd reel I switch off again... since then the lamp is not working anymore. [Frown]

Is there a fuse anymwhere? Have I burnt out the lamp? Any idea?
How can I check if the lamp is good and there is a damage anywhere else? [Confused]

Thanks for your help.

Flavio

Posted by Flavio Stabile (Member # 357) on July 15, 2007, 09:49 AM:

Hi! Does anyone own this projector?
Is it possible to burn its lamp only trying to light on again after few minutes you have light off it?
Is it so delicate???

Flavio

Posted by Mark Todd (Member # 96) on July 15, 2007, 12:48 PM:

I hope you get soem help here Flavio.
I wonder if it had a big bump when travelling, that can affect hallogen bulbs.
I`ve often got a projector through the post. The bulb lasts just one or two usings before blowing.
What did the seller say and can you get a bulb OK?
Hope so. Also what was the picture like before it went.
Anyway best wishes and lets hope soemone here has an answer, Mark.

Posted by Flavio Stabile (Member # 357) on July 16, 2007, 07:13 AM:

Hi Mark,

as already told, the Seller assured me the lamp was new...
During my first projection the light was very good, but I cannot be sure it was really a new lamp!
Furthermore I knew that HTI lamp usually doesn't break but they finishes their life with a light which is gradually darker and darker.

I've ordered a new lamp from Wittner but I'm seriously worried about the fact that a HTI lamp can be broken in such a simple way...

Hope to hear someone else with his own experience with HTI lamps.

Flavio

Posted by Kevin Faulkner (Member # 6) on July 20, 2007, 04:30 AM:

Flavio, I would think it's something else other than the lamp. Yes your right the lamps tend to get darker and more difficult to strike up before they die.

I think the fact that you say it was good when you first used it suggests a bad connection or failure of a fuse or the power supply.

With Xenon lamps they really get very bad at striking until they wont strike at all.

Kev.

Posted by Jose Artiles (Member # 471) on July 20, 2007, 06:58 AM:

Hi Flavio, i have a hti 16mm poland projector and that thing happen to me when i use my reconditioned projector for the first time.HTI lamps need about 10 min to give a good and correct balanced ligth,if you turn off the lamp and then on again that seriously damage the hti lamp,is better to wait at last 10 minutes to switch on again.For that reason the projector must have a kind of douser or a special dispositive that permits close the ligth without turn off the lamp.I hope this can help you [Wink]

kindest regards.
Jose

Posted by Jose Artiles (Member # 471) on July 20, 2007, 06:59 AM:

Hi Flavio, i have a hti 16mm poland projector and that thing happen to me when i use my reconditioned projector for the first time.HTI lamps need about 10 min to give a good and correct balanced ligth,if you turn off the lamp and then on again that seriously damage the hti lamp,is better to wait at last 10 minutes to switch on again.For that reason the projector must have a kind of douser or a special dispositive that permits close the ligth without turn off the lamp.I hope this can help you [Wink]

kindest regards.
Jose

Posted by Josef Grassmann (Member # 378) on July 21, 2007, 01:41 PM:

it seeems that same confusion has taken place.
If you have a HTI-lamp you can ignite it immediately after turing off. The lamp is designed for hot restart without any harm to HTI-lamp.
If you have a Marc 300 or Marc 350 or Gemini lamp they must cool down for minimum of 3min., better to wait 5-8min. A hot restart will destroy the lamp at once.
As Kevin Faulkner already metioned, the power supply is supect.
Take great care as ignition voltage is up to 6000 volts and without connected lamp even higher. You can die!!
If leads or terminals are too narrow to cassis or dust coated a spark jumps over to the metal cassis and destroys the transistor circuits in power supply for HTI-lamp.
Here you will notice a bouncing noise of the spark when you switched it on first time and lamp didn´t light up.

Posted by Flavio Stabile (Member # 357) on July 22, 2007, 03:28 PM:

HI All! Thanks for your reply.
The projector is now on hands safest than mine!
I took it to a very expert ex-Bauer technician here in Rome so I hope it will solve my problem.
The first thing is told me is... exactly what Kevin and Josef suggested. He think to a problem to the power unit and not to the lamp itself.... I really hope the damage is not serious!

Thanks
Flavio

Posted by Lars Pettersson (Member # 762) on March 10, 2009, 08:32 AM:

Flavio,
I´d be interested in how all this turned out: did your projector recover and if so, what was the fault? Has it run OK ever since? I hear a lot of contradictory things about HTI light, some say it´s just as convenient as Xenon, others say it´s to be avoided at all costs. I don´t really know who to trust, so any additional positive input would be nice! [Smile]

Cheers
Lars

Posted by Flavio Stabile (Member # 357) on March 11, 2009, 03:32 PM:

HI Lars,

yes, the problem was completely solved and I have projected many films so far (almost two years passed since then..) without any problem.

The problem was not serious and I was told that (if I remember well...) only a capacitor needed to be replaced. that's all!

Regarding a possible comparison between the XENON and HTI, I'm not so expert to explain the differences and advantages of the first against the latter... What I can say that the BAUER P8 T400 is very noisy, and especially the fan for the lamp is very tedious during projection: proabaly this is due to the 400 watt of the lamp.
I saw a projection with a EIKI Xenon with 350 watt, and this one is very quiet with respect to the Bauer.
Furthermore I don't like very much, in the Bauer, the fact that you can switch off the projection leaving the lamp on!!!

If you have any specific querstion please let me know and I will try to answer.

Flavio

Posted by Lars Pettersson (Member # 762) on March 17, 2009, 11:34 AM:

Flavio,
Thanks for your answer! I´m glad to hear everything´s fine with your Bauer. I´m a little short of time at the moment, but will ask for your advice regarding this projector in the near future. Thanks again. [Smile]

Cheers
Lars

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