Re: X10 dimmable Transformers for LV halogens

["Matt P." <matt.l@xxxxxxx>]

Yes, the cable lenghts and dimensions are important.  I tried to get=20
away with a 2.5mm for 100W over 5m and the lights were about 1/3=20
less bright than the ones with local transformers.

When you dim halogen their colour temperature changes a fair bit=20
too, from crisp white in my case to a moody yellow, which I think is=20
OK.=20=20

As a slight update to my earlier message, the buzz from the=20
transformers is almost totally blocked by the plasterboard in the=20
ceiling so I've decided to leave them there.  What I was shocked to=20
find though, was that the 12V 50W 60degree (very wide angle of light=20
for general lighting) halogen bulbs were responsible for all the=20
audible buzz so I had to replace the Sylvania (?) bulbs they had=20
supplied with Osram ones instead, these are totally quiet when=20
dimmed.

Cheers,
Matt


--- In ukha_d@xxxxxxx, "Nick Broughton" <mail@n...> wrote:
> Hell!  10mm cable for 200w over 4m.  I'm planning on putting the=20
lamps in
> the kitchen.  It's about 3m from one end to the other and I=20
thought I'd put
> the transformers in the airing cupboard - it's basically across=20
the landing
> from one end of the kitchen ceiling void.
>=20
> Do I _need_ to put the transformers in the ceiling void to get the=20
cable
> size down.  Is that calculator relevant to all transformers or=20
just the ones
> that tlc supply.
>=20
> There's also a warning about voltage drop/colour temperature on the
> calculator page if more than one lamp is used on a single=20
transformer.  I
> was planning on putting up to 4 lamps per transformer.  Do I need=20
to worry
> about this?  One of the reasons I've decided on LV Halogens is the=20
colour
> temperature.
>=20
> Nick
>=20
> -----Original Message-----
> From: Matt P. [mailto:matt.l@xxxxxxx...]
> Sent: 07 October 2003 22:43
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Re: X10 dimmable Transformers for LV halogens
>=20
>=20
> --- In ukha_d@xxxxxxx, "Nick Broughton" <mail@n...>
wrote:
> > I'm looking for recommendations for units that can be used with
> LD11's (or a
>=20
> I've just installed six of TLCs Premium 12V electronic transformers
> with LD11s and it's working just fine.  There is a light buzzing
> sound from the transformers so you may want to mount them slightly
> away from the room, I've got mine inside a wall partition.  Be=20
aware
> of maximum cable runs between transformer and light fittings=20
though,
> there's a calculator on the TLC site.  See here for more info:
> http://tinyurl.com/q35q
>=20
> Cheers,
> Matt