Re: signals in sydney

[Eddie Oliver <eoliver@efs.mq.edu.au>]

John MacCallum wrote:
> 
> WhaleOilBeefHooked wrote:

> >
> > Although sometimes (only ever seen them at country locations though) one of
> > the bottom lights will be white, and will stay lit even when the top yellow
> > is lit.
> >
> > DaveP
> 
> The dwarf signal that you refer to have one yellow light over
> 2 red lights. The bottom lights should both be lit when displaying
> the stop aspect and only the yellow light lit when the signal
> is displaying the proceed aspect.

Except for the "historic relics" of the original lunar-white system
which DaveP accurately described.

> These signal when used on main
> lines are usually only used as point indicators and work in
> conjunction with a home signal.

Huh? On main lines they are usually used for shunt moves not directly
covered by home signals, as in the examples at Gordon which the original
poster in this thread was referring to.

> The main line signals with small subsidiary lights under the main
> running lights can be as previously mentioned any one of a number
> of things. Calling on, Low speed, Close up or even Turn out.

How can they be turnout indications? Not true, unless you are referring
to the bands of lights providing turnout indications on single-light
colour-light signals (but again, the original poster explicitly was
talking about double-light signals).

Eddie Oliver