Posted 14 August 2006 - 04:58 PM
We didn't have any issues with popping breakers or anything of that nature, but a peculiar situation arose with the newest of our Arri 1.2k Pars. For some reason the connection between the male Edison of the ballast power cable and the female Edison of the line providing house power kept heating up to the point of nearly melting. At first I thought this might be caused by the fact that we had a rather long cable run to get to the light which was placed outside even though the stinger was beyond the proper rating for such a situation. So I switched the head to a line that ran a much much shorter distance yet the problem still persisted. To double check I made sure that each of the lines I had tested the head on were indeed 20 amp circuits and that nothing else was running off of these. As we had insured before this was still the case. So this was apparently not the issue. To further test what could be happening we checked to make sure that the lines were secure and free from anything that might be cause excessive impedence and sure enough they were fine. I then tried running the ballast off of flicker free mode at regular 60Hz output just to see if for some reason that might have been doing anything. Of course the troubled continued.
Unfortunately we wrapped for the day before we could test any further, and like most student shoots the schedule was too hectic and time consuming to get the head out again and try a few other options. Now I established that it wasn't a faulty stinger because I tried different ones. So as far as I could tell it was either a bad ballast or an issue with the head itself. We couldn't afford to spare a ballast from another light because they all had to contine working so that variable was not tested. I'm just wondering if anyone had any technical guesses at what might have been going on just for my own curiosity sake. Thanks.
Posted 14 August 2006 - 05:05 PM
Resistance = Heat
Either in the stinger or the ballast power cable there is a bad/old/corroded connection. Snip off the burnt ends and replace the connector with a new one. It will be as good as new.
Posted 14 August 2006 - 06:11 PM
Posted 14 August 2006 - 06:37 PM