That's helpful, thanks. The 'Charging Refresher' series of wiring diagrams doesn't actually mention the short and long armature differences - how would one tell... and what did they relate to - is one later than the other?
Can I also be thick over the "Most of the internal resistances on CAV DEL dynamos are open circuit" bit? I realise that means the circuit is not activated if its open, but what does that mean in practice vis a vis checking if the original resistance still operates and how you deal with that? I presume that your 7.5 Ohm is brought in to play when the SM switch activates the F-D bridge?
The Charging refresher article says:
"Repairing these windings can be a real pain, which is why (according to Harry Hale, the expert,) many of the DEL types are simply used with the resistor open circuit, or replaced for later machines. Again, there has to be some appropriate modification of the circuit – they might fit mechanically but need some other changes electrically"
I waas uncertain whether Open Circuit meant "not functioning", or whether one needed to detach something.
Can I also be thick over the "Most of the internal resistances on CAV DEL dynamos are open circuit" bit? I realise that means the circuit is not activated if its open, but what does that mean in practice vis a vis checking if the original resistance still operates and how you deal with that? I presume that your 7.5 Ohm is brought in to play when the SM switch activates the F-D bridge?
The Charging refresher article says:
"Repairing these windings can be a real pain, which is why (according to Harry Hale, the expert,) many of the DEL types are simply used with the resistor open circuit, or replaced for later machines. Again, there has to be some appropriate modification of the circuit – they might fit mechanically but need some other changes electrically"
I waas uncertain whether Open Circuit meant "not functioning", or whether one needed to detach something.