S4 Leko body 575w cap vs. 750w cap

Just inherited caretaking of a stock of S4 Lekos, half of which have 750w caps. Is there any difference between the leko bodies that were originally designed for 575w caps and the newer bodies meant for 750's?

Are there any problems with using a 750w cap in an older body that was designed for 575w caps?

should i expect premature burning of reflectors over the long haul?

are there ratings for the bodies I should be aware of?

thanks in advance,

SJP

Aristobulous over 15 years ago

I am not aware of any difference between bodies themselves, my understanding was the only difference was in the lamp caps, today I don't think they make the '575' cap anymore, I'm pretty sure they're all 750
jpgagnon over 15 years ago in reply to Aristobulous

The original series Source 4's will not accept a newer style cap. There is a difference. The older ones had a slightly different back end where the cap goes on. THey have little nubs that don't let the new caps on them. I have plenty of these in my rental stock, so it's sort of a pain.
BLGranucci over 15 years ago in reply to jpgagnon

In addition, there are some Source 4 fixtures that were built before the 750w lamp that will take the 750w cap. We have had a full rig of them operating on Mary Poppins for going on 4 years now with no problems that we have heard of in the shop.
Aristobulous over 15 years ago in reply to jpgagnon

I can't remember where I may have heard this now (either from official ETC info or not) but I believe you could grind the nubs off to make the new caps fit, I have not needed to test this theory yet as the need has not arisen

*edit* my statement of there not being a difference was simply on the basis of the reflector etc, I had indeed forgot about the change in the cap mount */edit*

[edited by: Aristobulous at 1:58 AM (GMT -6) on Wed, Oct 6 2010]
strobushdu over 15 years ago in reply to Aristobulous

I work at a theater where we did just that. I took a angle grinder and cut off the nubs. The new caps fit on nicely now.