In message

, Recliner writes
Clive wrote:
In message , Steve Fitzgerald
] writes
In message , Clive
writes
The trains haven't changed, has the signalling system?
I think you might find they have!
The driver also used to be able to speak to control in a system that ran
through the juice rails. So what is the system now and when did it change?
Didn't he use the usual wires along the tunnel wall?
That was done on the old 38 stock, indeed was tested every evening in
Colindale tunnel going north, two crocodile clips from a cabinet behind
the driver, and it never interfered with the juice. Whereas if the
handset was clipped onto the same wires it cut the juice to the rails
and connected you the juice controller.
--
Clive

On 20/02/2013 20:21, Clive wrote:
In message

, Recliner writes
Clive wrote:
In message , Steve Fitzgerald
] writes
In message , Clive
writes
The trains haven't changed, has the signalling system?
I think you might find they have!
The driver also used to be able to speak to control in a system that ran
through the juice rails. So what is the system now and when did it
change?
Didn't he use the usual wires along the tunnel wall?
That was done on the old 38 stock, indeed was tested every evening in
Colindale tunnel going north, two crocodile clips from a cabinet behind
the driver, and it never interfered with the juice. Whereas if the
handset was clipped onto the same wires it cut the juice to the rails
and connected you the juice controller.

The handset system is still available in case the radio fails, isn't it?

My friend who drives on the Northern Line tells me that he has never
used that system, though a handset with crocodile clips is indeed stowed
in the cab.

In message , "
writes
The handset system is still available in case the radio fails, isn't
it?
I don't know, it's years since I worked on the tube, but it wouldn't
surprise me.
--
Clive

Clive wrote:
In message
, Recliner writes
Clive wrote:
In message , Steve Fitzgerald ] writes
In message , Clive
writes
The trains haven't changed, has the signalling system?
I think you might find they have!
The driver also used to be able to speak to control in a system that ran
through the juice rails. So what is the system now and when did it change?
Didn't he use the usual wires along the tunnel wall?
That was done on the old 38 stock, indeed was tested every evening in
Colindale tunnel going north, two crocodile clips from a cabinet behind
the driver, and it never interfered with the juice. Whereas if the
handset was clipped onto the same wires it cut the juice to the rails and
connected you the juice controller.

Wasn't the juice cut by pinching the wires together to short the circuit?

On 20/02/2013 21:12, Recliner wrote:
Clive wrote:
In message
, Recliner writes
Clive wrote:
In message , Steve Fitzgerald ] writes
In message , Clive
writes
The trains haven't changed, has the signalling system?
I think you might find they have!
The driver also used to be able to speak to control in a system that ran
through the juice rails. So what is the system now and when did it change?
Didn't he use the usual wires along the tunnel wall?
That was done on the old 38 stock, indeed was tested every evening in
Colindale tunnel going north, two crocodile clips from a cabinet behind
the driver, and it never interfered with the juice. Whereas if the
handset was clipped onto the same wires it cut the juice to the rails and
connected you the juice controller.

Wasn't the juice cut by pinching the wires together to short the circuit?


Yes.

In message

, Recliner writes
Wasn't the juice cut by pinching the wires together to short the circuit?
Yes, and clipping on the handset did just that.
--
Clive