wiring

I have got a few of these old Hornby Dublo/Triang signals. I am reasonably happy about how to wire them up but I am unsure of the power source. Does anyone know whether they should be wired to the 16v AC output from a controller or whether they need to be powered by 12v DC. I am thinking of upgrading a couple but I don't want to burn them out when I test them.

Any help would be gratefully received. Here is what i am talking about:



Bob(K)

they were designed to run on a 12v dc system,so you might consider
some means of dropping the power down to that a diode perhaps
not sure of the size.

;-):cool:

Thanks Owen - presumably I could use something like an old phone charger?

Bob(K)

Bobk, no harm trying, but as i said you can use the 16ac, lets hope one of our
electronics men comes up with the goods.

thumbs:cool:

BobK, if they have a solenoid inside the mechanism, then perhaps they would be like Point motors & require a pulse of power & so 16vAC  or 12vDC. I would NOT leave them powered up.

 Looking at the old catalogues, they used a pasing contact switch R044 to supply a pulse of power for point motors or semaphore signals.

Ron

I agree, in that if left powered up they would most likely burn out but as you suggest a passing contact switch should solve that. It is the power source itself I am unsure of and what I was thinking of is an old phone charger with a passing contact switch in the circuit. If Owen is correct and they should be 12v, then I think the normal 16v AC outlet would be too much for the solenoids - but I don't really know :roll: I am hoping someone on the forum still has some of these in operation.

Bob(K) 

Bobk, i am running the old hornby point soleoids on my 16vac outlet
with stud+ probe they work ok, i was more concerned about lights
but i now see they do not have any,so you should be fine.

:oops::cool:

Thanks again Owen. I will give it a go.

Bob