11-03-2019, 04:35 PM
My RP saloon has a C35M Lucas dynamo fitted, but retains its cutout box designed for the earlier C35A instrument. As a result, I have no summer charge setting that works.
Being a complete electrical dunce when it comes to these things, I consulted my 1940 (eighth) edition of the 'Motor' Electrical Manual which appears to suggest that there should be a resistor between the D and F terminals on the dynamo which is shorted out by the lighting switch on the dashboard to give winter charging.
1. Am I right in this assumption?
2. If so, does anyone know how many ohms the resistor should be?
Given that the dynamo is currently (no pun intended!) on my bench awaiting its new brushes, I would quite like to put it back and get both settings working.
Also, I assume that, as presently set up, there is no field fuse in the circuit as the earlier instrument had the resistor and field fuse under a cover on top of the dynamo case. Where should the fuse go in the field circuit, please?
Being a complete electrical dunce when it comes to these things, I consulted my 1940 (eighth) edition of the 'Motor' Electrical Manual which appears to suggest that there should be a resistor between the D and F terminals on the dynamo which is shorted out by the lighting switch on the dashboard to give winter charging.
1. Am I right in this assumption?
2. If so, does anyone know how many ohms the resistor should be?
Given that the dynamo is currently (no pun intended!) on my bench awaiting its new brushes, I would quite like to put it back and get both settings working.
Also, I assume that, as presently set up, there is no field fuse in the circuit as the earlier instrument had the resistor and field fuse under a cover on top of the dynamo case. Where should the fuse go in the field circuit, please?