builders_1sugar

This might seem like a really stupid question, but it doesn't have a standard domestic 3-pin square plug fitted has it (I once bought a Prelude profile that had been used in a hotel that had a domestic plug on it)? If so, it might have blown the fuse. If it has a BS546 15A or CEE 16A then ignore me :-)

Crikey! No domestic plug.

Source 4s can also develop faults in the insulation of the wiring set. It's a bit of a design flaw, as the lamp housing assembly can bite on it if tightened too hard (insert innuendo here).

 

Obvious check: Is the dimmer outputting power? The fuse might have tripped when the lamp blew. If an alternative lantern is working in the socket, and you've checked the wiring on the socket and plug, then a failed continuity test between the pins and lampholder would indicate this. The spares are easily available, but aren't cheap if you're on a budget. https://stagedepot.c...-par-wiring-set b

Dimmer is outputting, yes. Socket and plug are good. £40 for a wiring set. Eesh. Thanks for the suggestion.

Maybe the old lamp died because the socket was arcing - where the pins fit in - so the lamp holder is faulty, not the lamp? Did you see any broken filaments? You need a test meter - even a cheap one that can indicate continuity. Pin to lamp holder, then the other side of the lamp holder back to plug, and of course across the pins of the lamp.

 

I have a couple of dozen second hand fittings of which most are GY9.5 and finding I quite often need to replace lampholders, particularly after a bulb failure. Most are cheap, basic and not very effective [Microspot 308/Minim23 calibre] this is rapidly becoming a cost effective decision as a new lampholder costs more than a cheap LED flood which is in many ways just as acceptable for a back street AmDram and certainly easier to rig/focus for many of them.

I'm not trying to put a source4 into this category, just commenting on the lampholder failures.

 

Hahaha! 'I'm nor saying they're a problem... but I'm directly associating them with other heads which are a problem!" - something like that? :-) No love lost, you could well be on to something.

Maybe the old lamp died because the socket was arcing - where the pins fit in - so the lamp holder is faulty, not the lamp? Did you see any broken filaments? You need a test meter - even a cheap one that can indicate continuity. Pin to lamp holder, then the other side of the lamp holder back to plug, and of course across the pins of the lamp.

Solid advice. Will try this first.