From the Resto-Mod department

Victoria never gets out of power ! The antic dynamo was replaced by a modern alternator

The SIIA is originally fitted with a dynamo to produce the electricity needed to charge the 12v battery, as alternator were not even invented yet. Victoria has been running on dynamos during 58 years: why changing then ?

The first problem is that dynamos are less durable than alternators. Built at a time were things were not lasting, but aimed to be repaired at a decent cost. Things have changed and repairing a dynamo today costs the price of a new one. But... the production of dynamos stopped decades ago, which means that the replacement units are cheap to buy, but cheaply built. Why not repairing it ourselves ? Yes, this is doable at home with a bit of mechanical experience.

But then... The dynamo, pulley-driven by the engine's accessory belt, produces a direct current which needs to be stabilized by a separate device, very prone to fail too. Victoria had several replacements and the quality of the current stabilizers was only getting worst. These can't be repaired at home by the average hobby man.

On top of that, the dynamo is an heavy beast but does not generate a lot of current: at idle speed, with headlamps on, the battery is actually drained to support the immediate consumption. It is not a big issue and the car never suffered from that aspect.

But if you add all of the above, when times come to restore a car, the question arises: go alternator or not ?
As we planned to replace the windscreen with a heated one (the car lives in cold Switzerland), a high consumption device, the decision was easily made.

More pictures below.