Hi Has anyone got any pictures and information for the leak transformer  that was used for only the Thorn 200W SLI/H hight output lamp as if I can find out starting  duration & voltages current as these are different to the normal SLI/H lamp might be able to get a leak transformer made as it is very difficult  to find an original leak transformer or a 175W CWA metal halide transformer here in the UK any help would be appreciated. kind regards Bob

The specs for the lamp can be found on Lamptech, see here; the tube shown is the 5-leaf version, which seems to be rather rare, but electrically the 4-leaf one should be the same. I've only ever seen one genuine ballast, but I don't have a photo, sadly.
If you can actually get one made, get two, I'll have one, as long as it doesn't cost an arm or leg, I need the ones I have 

Hi Rommie what I need to know is the starting current and voltage and duration as this lamp is different as you know been a HO it won't work on a pre head start .If can find out that information I might be able to get some made and you will be the first to have one if he can make them for a reasonable cost kind regards Bob 

I only know what James says on Lamptech I'm afraid, might be worth sending him a PM..? Mine certainly starts on a 135/180W leak transformer, although it's been a while and I don't recall the figures. It wasn't ideal though, a little under-driven if I recall.

As I said, I run mine on a US 175W CWA MH ballast on a 115V 60Hz inverter, which works for me, but I already had both of those when I got the lamp, so you might not want to spend the extra $$ importing them..!

Thanks I will pm James kind regards Bob

I do have an original Thorn SLI/H 200W ballast, it is built in quite deep into my ballast cabinet!  If you need a photo I will dismantle that.  But perhaps instead it would be enough to make some electrical measurements?  If you know which parameters you need I can try to measure those at work.

Hello Bob,

a difficult search.
I only have this information for you from 1973/1974.
That looks very modern for the time.
Maybe it helps anyway.



Source: THORN LIGHTING, Comprehensive Catalogue 1973/74


Regards

Olav

Thanks very much Olav a big help kind regards bob

You are welcome Bob.

Thanks 

Hello Bob,

I found a little addition for you:



Source: THORN comprehensive catalogue 1969-1970, page C12



Source: THORN comprehensive catalogue 1969-1970, page C15


Regards

Olav

Thanks Olav that I great kind regards Bob

I do have an original Thorn SLI/H 200W ballast, it is built in quite deep into my ballast cabinet!  If you need a photo I will dismantle that.  But perhaps instead it would be enough to make some electrical measurements?  If you know which parameters you need I can try to measure those at work.

Hi James what I need to know is the starting voltage and duration with a lamp connected  and what voltage does the ballast produce with the lamp disconnected if that is possible kind regards Bob