In article , Adam
Aglionby writes

In the U.K. haven`t seen an electronic LV lighting transformer that dosen`t
say `dimmable` in years.Wether its from a big name or a lower cost
import.Pretty much all ETs are dimmable by a cheap wall plate dimmer here.
However Ive never suceeded is getting a system to operate.
My kitchen has (had) two adjacent dimmers each driving 5 X 20W 12 V
electronic transformers.
The dimmers inter-reacted and oscillated as described I returned dimmers
to the supplier and switched supplier, stil the system failed.
I also had electronic transformer failures .
rep[laced the electronic transformer suppliers to no advantage.
Have now dispensed with dimming.
Note 1
There are now small torroidal transformer for 1 lamp which are sized to
fit into the light aperture. a better solution I think
Note 2
The electronic hash created by the electronic dimmers is sufficient to
block out all medium and long wave radio reception in the room (and most
of the house)
--
ddwyer