Squareback vs round back alternator?
Current draw for each item is approximate as I do not have a 1960 specific manual or Sun card. My point is to illustrate the current paths.
The voltage at the coil during start should be very close to the battery voltage during start.
Battery voltage during start should be at least 9.4 Volts. I don't see any reason why 1960 would be much different.
Otherwise you should only be seeing battery recharging on the ammeter.
As far as the voltage measurement. I suspect this will depend on how the meter measures the cycling as the points open and close.
Votlage drop across the resistor for a steady flow (points closed) is current multiplied by resistance. Assuming 3 amps through the coil 12.2 Volts is about right.
Ammeter will show battery charging. Illustration shows 6 amps but it will actually range from 10 to 20 amps after starting to 0 amps after a few minutes of charging.
Any additional items attached to the battery positive terminal will make it appear as if the battery is charging when they are turned on.
This is correct. Power to the starter solenoid and coil goes through the ammeter and key switch.
Current draw for each item is approximate as I do not have a 1960 specific manual or Sun card. My point is to illustrate the current paths.
The voltage at the coil during start should be very close to the battery voltage during start.
Battery voltage during start should be at least 9.4 Volts. I don't see any reason why 1960 would be much different.
If the lighting and accessories are still wired to draw power from the battery side of the the ammeter, that is what you are seeing on the ammeter.
Otherwise you should only be seeing battery recharging on the ammeter.
As far as the voltage measurement. I suspect this will depend on how the meter measures the cycling as the points open and close.
Votlage drop across the resistor for a steady flow (points closed) is current multiplied by resistance. Assuming 3 amps through the coil 12.2 Volts is about right.
Ammeter will show battery charging. Illustration shows 6 amps but it will actually range from 10 to 20 amps after starting to 0 amps after a few minutes of charging.
Any additional items attached to the battery positive terminal will make it appear as if the battery is charging when they are turned on.
The nose doesn't look much shorter. Try it - see how it runs.
