"logized" wrote in message
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"Dave Jennings" wrote in message
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logized yik-yakked:
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Looks like there is some incompatibility even though the transformers
appear to be of equal spec to the old ones.
I think it would be a good idea for you to post the model and specs
of the transformer, dimmer and bulb wattage here and maybe someone
can pinpoint the problem.

Hi

OK, my mistake on ne part - different makes as original make wasn't
available from the wholesalers, but specs do seem same:

Original Transformer:

Platino brand, Model P 902

Electronic Transformer

240v, 50HZ, 60VA

20-60w

New transformer:

Lytlec brand, Model LDT 105

240V, 12v, 105VA

( Some of the specs on one don't match the other, and I'm a layman so
excuse me if this means nothing, I'm just reading the figures off! )

Dimmer is standard dimmer switch, which worked with all 4 bulbs and
still works on sole remaining bulb.

Using 50w bulbs.

Hope this is some help!

The new transformer spec is plenty ok for a 50W bulb and the manufacturers
claim it can be dimmed with a standard dimmer - but I think at this point
it would be an idea to replace the dimmer with a standard light switch for
now and get the lights working with that.
If they then work ok, you would need a new dimmer - the "Standard" type is
usually only rated at 250W max and as your 4 lights + transformers would
probably overload it - upgrade to a 400Watt type that specifies it is
suitable for dimming any type of low voltage Halogens.
See this guide -
http://www.tlc-direct.co.uk/Technica...immerGuide.htm

Dave


One further note - the new transformer could be used to power 2 x 50W bulbs
and this may be necessary as the above datasheet specifies a max of 3 x
105VA "normal" quality transformers can be used with a 400W dimmer.

Dave