Conventional Fixtures - 750W lamp in a 575W Source 4?

[malex]

Can I do this? Are the 575 source 4 fixtures strictly rated for those lamps or are they interchangeable? I've been in the lighting biz for a few years now, but have never found myself in the position of mixing wattages and/or fixtures. Any experiential information will be greatly appreciated.

[gafftaper]

You should not use a 750W in the 575W only versions. I believe that if you have the 575W bodies the lamp caps actually will not accept a 750W lamp. The HPL750 Watt lamps have a small pin to prevent you from plugging them into an improperly rated base. Someone from ETC will probably stop in here tomorrow and give you a definitive answer.

[Sony]

Originally Posted by gafftaper

You should not use a 750W in the 575W only versions. I believe that if you have the 575W bodies the lamp caps actually will not accept a 750W lamp. The HPL750 Watt lamps have a small pin to prevent you from plugging them into an improperly rated base. Someone from ETC will probably stop in here tomorrow and give you a definitive answer.

750W Lamps have a 3rd pin that prevents them from being placed in a fixture that is not rated for 750W. I have 6 Fixtures at my college right now using 750W lamps just because the extra lumens make for a very strong and powerful special. Great for creating a strong isolation on stage. Only Source 4 Revolution, Par's, ParNEL's, Zoom's and Fixed Focus fixtures can accept 750W Lamps. Source 4 Jr's and Jr Zoom's only accept the 575W lamps

[TimMiller]

Our local lighting dealer told us that there is no problem with installing a 750 into a S4 jr. You have to remove the screw to install it, but i am also curious what ETC would say about it. I know ETC will void your warranty. Also there is no where that i have seen, where they specifically that installing a 750 will create a fire hazard. The tail caps are the same, the reflectors are made the same minus the size. But if you have a s4 that has a 575 in it, and there are no screws to prevent you from installing a 750 into the lamp housing than i would say go for it.

[SteveB]

Originally Posted by TimMiller

Our local lighting dealer told us that there is no problem with installing a 750 into a S4 jr.

Find another dealer. Anyone recommending this, which is something very, very basic and is information readily available on the ETC website, can not be trusted to handle the more complicated stuff - like basic electrical safety.

And, NO, an S4 Jr. cannot handle a 750w lamp.

SB

[zac850]

Originally Posted by SteveB

And, NO, an S4 Jr. cannot handle a 750w lamp.

Plus, if you really need the extra punch from a 750w lamp, you probably shouldn't be using a jr.

[icewolf08]

If you want to use a 750W lamp in an older (575W) source four, you can, but you have to update the fixture. At a minimum you need to buy a new lamp base (TP-22H) that has tails rated for the higher amperage. At best, you should order the S4 retrofit kit, that comes with a few new parts for the lamp cap including the lamp retaining clip. Once you upgrade the fixture you will have to drill out a small hole to accommodate the third pin on the lamp.

As for putting 750W lamps in a S4 Jr. I don't know anything about that, and wouldn't try it unless someone from ETC told me directly that it was OK.

[Grog12]

The following is by no means a suggestion or a proper way to do anything, it is merely the 3rd person retelling of certain comprimises made by other people. It is most certainly not the right way to do this.

You do not need to modify the cap to use a 750w lamp in the old style 575 caps. You merely need to remove the 3rd pin, something that you occasionally have to do with 750w caps depending on how well the lamps were manufactured.

Also, while the old S4's are rated for 575w, it is has been told to me that the only true difference is the fact that there's a hole for 3rd pin.

[philhaney]

Originally Posted by Sony

750W Lamps have a 3rd pin that prevents them from being placed in a fixture that is not rated for 750W.

Originally Posted by SteveB

Find another dealer. Anyone recommending this, which is something very, very basic and is information readily available on the ETC website, can not be trusted to handle the more complicated stuff - like basic electrical safety.

I'm with SteveB on this one. That third pin is there for a reason; To keep you from installing a lamp in an instrument that is not rated for it. Sure, you can nip the pin or drill that hole. It may work. It may not.

Just ask yourself this question: "Is someone's life worth cutting this corner?"

[TimMiller]

The are one of ETC's biggest dealers......... Wonder what steve terry has to say.........