Re: Specific Dimmers for use with LD11

[Richard Malcolm-Smith <rich@xxxxxxxxxx>]

Simon Daykin wrote:
> Hiya Chaps,
>
> Been finishing the low voltage garden lighting at the moment,  and
naturally
> will be adding it to the X10 network.  Basically its three circuits of
12v
> lights,  4 x 20w on 2,  and a further 2 x 20 on the third.  The
transformers
> which you can buy with the light system from B&Q are clearly
toroidal,
> however have various additional circuitry in them,  so I am unsure of
their
> ability to dim using an LD11.
>
> So,  I was planning to buy three new transformers (each to be dimmed
by a
> separate LD11), and am therefore trying to decide whether to stick
with
> Toroidals which I know work with LD11's, or go with electronic
transformers.

> The garden lighting is cabled over about 20m per circuit,  how well to
the
> electronic dimmers cope with long cable lengths (someone told me they
don't
> perform as well as toroidal's)??


They will radiate heaps of RF on longer runs, and the high frequency means
higher losses due to parasitic capacitance of the cables.

Can you find what the circuitry in the other transformers is? It may just
be a
MOV or something that doesnt matter.


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