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Thorn OSQ1000 ignitor connections.

Thorn OSQ1000 ignitor connections.

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Showing the rear of this lantern which has a high voltage pulse transformer in the back with the ballast and PFC mounted remote.

From top to bottom on the left:
The top blue wire is the neutral.
The green/yellow wire is the earth.
The brown wire is the live connection from the ballast.
The black wire going into the bottom terminal is the ignitor trigger connection which I have wired to the mains live via a simple momentary push-to-make push button switch.
On the proper gearboxes the trigger connection would have a timer on it that energises it for 3 seconds when power is applied. I simply press the button for a few seconds until the lamp has struck.

The ballasts I use is a 1000w SON and a 400w MBF ballasts in parallel which gives me close to the required 15 amps that these CSI lamps need.

387A3369.JPG 387A3366.JPG ECD2D1E0-784D-4BBB-B33E-D05F0C7BA4B5.jpeg hyh.jpg

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Album name:FrontSideBus / Lanterns & Fittings
File Size:628 KB
Date added:Jul 07, 2020
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Date Time:2020:07:07 21:12:35
DateTime Original:2020:07:07 21:12:35
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Jul 07, 2020 at 04:44 PM Author: Ash
The capacitors in this ignitor are way bigger than in any standard SON/MH ignitor, whether ballast independant or not. It lloks like this lamp needs some serious energy pushed in the ignition pulse to get the arc going, or maybe it is for hot restrike ?

Also, why the external timer unit and not just a timer cutout implemented inside the ignitor itself ? (the required electronics - 555 timer - already existed in 1980)
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