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This topic comprises 3 pages: 1 2 3
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Topic: kinoton pk-60 vertical unsteadiness
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Stephen Furley
Film God
Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 12-11-2007 06:47 AM
quote: Larry Shaw
That is a long-life skate. We think of it as more of a tan or beige color. It is a hard material, some have asked if it is a ceramic (its not)and it can break if smashed against a hard surface. The trade offs are higher cost and a less slippery surface resulting in a tiny bit less stability and greater dirt retention. We sell few.
I can't see the point in it, if the only advantage is a a longer life. I don't know what the normal ones cost, but whatever it is it's going to be a tiny amount in the total cost of running a cinema, and the normal ones last for quite a while. (unless you do what I did once, and leave light on scren with the gate open for a few seconds, until you notice the smoke coming from it. ![[Frown]](frown.gif)
quote: Larry Shaw
Coincidentally I just finished an hour or so at http://www.lamptech.co.uk . A very interesting site. Thanks.
It's an interesting site. It's run by James Hooker; he doesn't get much time to work on it, so updates are rather infrequent.
The 2kW three electrode xenon lamp from a tank searchlight web page looks very similar to the ones used in the early BTH xenon conversions for film projectors; terrible things, I haven't seen one for years, and I don't think you can get the lamps now.
The Philips 500W water cooled mercury lamp, web page looks something like the pulsed lamps that Philips used for projection, from pictures that I've seen of them, though I've never actually seen one of the lamps. Bernard Tonks would know; he used to run them.
There's something here about a repair that James did on an old lightbulb; he's a clever fellow.
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Bernard Tonks
Jedi Master Film Handler
Posts: 619
From: Cranleigh, Surrey, England
Registered: Apr 2001
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posted 12-11-2007 08:56 AM
quote: Stephen Furley
The Philips 500W water cooled mercury lamp, web page looks something like the pulsed lamps that Philips used for projection, from pictures that I've seen of them, though I've never actually seen one of the lamps. Bernard Tonks would know; he used to run them.
Well almost the same, and as the website picture except that Philips used 800 watts for the FP20 pulse light projector.
To quote from a manual, the SSP.800 gas discharge lamp consists of a quartz tube only 3-1/8” (80mm long), 72 impulses per second or three impulses per frame, there of course being no flicker shutter. The average life of lamp was 33 hours under full load. The average bulb life at the ABC Queens, Bayswater was between 60-70 hours, and many did upto 115 hours. The size of scope screen was 36’. This was in the year 1960, and the lamps were water cooled.
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