Film-Tech Forum ARCHIVE: Christie lamphouse trouble

This is topic Christie lamphouse trouble in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Aaron Sisemore (Member # 145) on 12-04-2001, 07:44 PM:

I just replaced a Chinese 'Cine-Lite' 2000W bulb with a new Osram bulb into a Christie H20 lamphouse with CFS power supply, and now where the igniter used to strike, albeit with some futility trying to light that Chinese junker, refuses to autostrike at all now with the Osram. Voltages are OK, and the bulb manual strikes right up and runs at current. Any ideas as to why it will not autostrike now?

As mentioned above, in the past it has autostruck Osram, ORC and the Chinese bulbs just fineuntil the latter began to age and then would take longer to strike until after several unsuccesful tries the autostrike quit running and it had to be manually struck, after a period of time (read: next show in that house) it would try the autostrike again and again, etc...

Any assistance would be appreciated.

-Aaron

Posted by Gordon McLeod (Member # 33) on 12-04-2001, 08:54 PM:

Check the amprite timer and the zenier

Posted by Ken Layton (Member # 133) on 12-04-2001, 09:28 PM:

Yes, that old Amperite time delay relay (inside the igniter) is prone to failure.

Posted by William Hooper (Member # 71) on 03-19-2004, 03:40 AM:

quote:
Yes, that old Amperite time delay relay (inside the igniter) is prone to failure.

What's the part number & a source for the Amperite time delay relay?

This one's hosed, filament broken, arced inside the tube, & ground wire from the igniter chassis to the terminal strip is vaporized.

Posted by Ken Layton (Member # 133) on 03-19-2004, 09:46 AM:

Antique Electronics (www.tubesandmore.com) in Tempe, Arizona has them. Get the numbers off the old time delay (it looks just like a vacuum tube).

Edit:

Amperite # 50C10T
50 volt heater
Normally Closed contacts (rated at 3 amps)
10 second delay
9 pin miniture base (looks like a 12AX7 tube)

Pins 1 and 6 are heater
Pins 3 and 4 are contact #1
pins 8 and 9 are contact #2

Posted by William Hooper (Member # 71) on 03-22-2004, 01:45 AM:

Thanks, Ken.

This one had heat shrink tubing over it, & when removed only 'Amperite' could barely be made out cooked off the tube & transferred in reverse to the inside of the heat shrink.