PSi Posted July 13, 2020 Share Posted July 13, 2020 This is rather an odd question, but still: My relatives used to have a lot of Hornby Dublo stuff, and when visiting them in the late 60's I was allowed to assemble a huge layout on the floor of their hall. Thy had two locos, the other was A4 Mallard, I cannot recall the model of the other loco. The locos suffered from rather rough handling and some of the valve gear was in a state that caused the locos to occasionally jam. The controller was a Hornby Dublo A3 controller. When the loco jammed, or I accelerated the train too fast, the overload tripped inside the A3 controller. The overload trip was reset when the speed controller was set back to zero. The sound of the tripping and releasing of the overload trip was interesting, but this being some 50 years ago... I wonder if any RMweb readers has still got a Hornby Dublo A3 controller in working order and could record the sound of the overload tripping and releasing, or if someone knows of a YouTube video where the overload trip could still be heard. pekka 1 Link to post Share on other sites More sharing options...
stewartingram Posted July 13, 2020 Share Posted July 13, 2020 Boinggg Link to post Share on other sites More sharing options...
Dublodad Posted July 13, 2020 Share Posted July 13, 2020 Sounds about right, I and others in the HRCA still use A3's etc. Maybe I should dig one out and record it Terry Link to post Share on other sites More sharing options...
PSi Posted July 13, 2020 Author Share Posted July 13, 2020 2 hours ago, Dublodad said: Sounds about right, I and others in the HRCA still use A3's etc. Maybe I should dig one out and record it Terry Please do! pekka 1 Link to post Share on other sites More sharing options...
RMweb Gold john new Posted July 14, 2020 RMweb Gold Share Posted July 14, 2020 The big red bulb coming on and the associated b-doing sound when something goes wrong is sadly lacking from modern controllers. The electronics may make for better control but the lack of the alerts is retrograde. Link to post Share on other sites More sharing options...
Dublodad Posted July 14, 2020 Share Posted July 14, 2020 Pekka How is this 1 Link to post Share on other sites More sharing options...
DCB Posted July 14, 2020 Share Posted July 14, 2020 (edited) The cut out will growl as an overload approaches. The cut out is at about 1 amp, which is about all an overloaded H/D vertical motor loco can take before burning out. I have three A3s, They are excellent cut outs, vastly better than polyswitches, its a shame you can't buy a similar stand alone cut out today, though it would probably be £50 where a polyswitch is about 2p. Edited July 14, 2020 by DavidCBroad Link to post Share on other sites More sharing options...
PSi Posted July 14, 2020 Author Share Posted July 14, 2020 (edited) 6 hours ago, Dublodad said: Pekka How is this [ https://www.youtube.com/watch?v=eQlhuMplTA4 ] Ah! Thanks a lot! Yes, it was the sound of resetting of the overload trip that I faintly recalled. You made my day pekka Edited July 14, 2020 by PSi typos Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now