Quote:
Originally Posted by Herald1360
Quote:
Originally Posted by murphyv310
It must have a dynamo as alternators are for negative earth.
|
Except for a few Lucas 10AC or 11AC types with separate control gear. I don't know about foreign makes......
|
Ah - but the diodes in the alternator are still the same way round, so what murphy310 still stands.
Quote:
The big picture is not clear, but it's not unlikely for a vintage car enthusiast to have an old radio (+ve earth) that he wants to use in a more recent car.
|
AFAIK there were no vintage (that's pre-1931) cars fitted with radios.
Back to the original question, easier to change the radio, and the fact that quite a few old car radios allowed the polarity to be reversed.