Hey Cane Pole

[Barnacle Bill]

Please clear my thinking up for me. A full wave bridge rectifier, like just about every outboard made uses, has 4 connections. Ground, 2 inputs and output. A tach is normally connected to one of the inputs. Now visualize a drawing of the circuit with the ground on top, output on the bottom and inputs on each side. The tach is connected to the right side. Am I correct in saying that if any of the diodes open, the tach will still work? Of course if one of the diodes on the right side shorts, the tach will not work. How about if one of them on the left side shorts? Will the tach still work? I use to know all this but can't remember anymore. Thanks

[Cane Pole]

Please clear my thinking up for me. A full wave bridge rectifier, like just about every outboard made uses, has 4 connections. Ground, 2 inputs and output. A tach is normally connected to one of the inputs. Now visualize a drawing of the circuit with the ground on top, output on the bottom and inputs on each side. The tach is connected to the right side. Am I correct in saying that if any of the diodes open, the tach will still work? Of course if one of the diodes on the right side shorts, the tach will not work. How about if one of them on the left side shorts? Will the tach still work? I use to know all this but can't remember anymore. Thanks

Usually if a diode opens in a full wave rectifier, the voltages drops, but the circuit may still work, depending on the operating voltage of the affected circuit.
A tach could probably work, but I would doubt it's accuracy.

Tom

[Barnacle Bill]

Usually if a diode opens in a full wave rectifier, the voltages drops, but the circuit may still work, depending on the operating voltage of the affected circuit.
A tach could probably work, but I would doubt it's accuracy.

Tom

OK, thats what I was thinking. I finally found a schematic for one. It looks like if one of the diodes on the left side shorted, the tach may or may not work, but not accurately. Thanks Tom.