Britbike forum Forums British motorcycles in general British motorcycles in general Using a 3 phase regulator with a 2 phase alternato

I have a generic 3 phase regulator/rectifier sitting in my garage and was thinking about using it on my 68 A65 to replace the standard zenor & rectifier. The regulator/rectifer is similar in looks to the Podtronics unit and has three yellow input wires for the alternator and black red output wires.

I'm not sure which alternator I have, but its certainly a two wire type with encapsulated coild.

Can I simply connect my two alternator wires to any two of the yellow wires and what about the spare yellow wire? Should the spare yellow wire be connected to one of the alternator wires or simply disconnected?

All info welcome.

Don't alternators only come in single phase and 3 phase types ?

Its possible your reg/rec unit will operate with only one phase connected,
someone else will have to comment/expand on that.

Short answer , Yes ... to either of these choices .

Longer ansewer ;
With any 2 of 3 yellow wires ... wired as inputs , it will work as designed .

With the extra wire , paired to one of the others , heat disapation will be enhanced for half of one phase .
Not that this helps much , but it wont hurt either .


.

Great answers thanks, I have another question on a related issue as follows:-

At present, the output from the regulator/rectifier goes directly to the ammeter and then on to the zenor via the ignition switch.

With the regulator/rectifier, can I wire the black negative output wire directly to the battery or should I connect it to the wire leading up to the ammeter?

Hi,


At present, the (DC) output is just from the rectifier, the "regulator" is the Zener diode.

Risking echoing Nick, if you want the ammeter to continue to indicate both charge and discharge, the DC output from the new reg./rec. must pass through it; i.e. the reg./rec. Black wire must be connected to the bike's Brown/White wire "leading up to the ammeter", where the old rectifier used to connect.

Hth.

Regards,

Well spotted Stuart, I meant to say the existing setup outputs from the rectifier up too the ammeter via the brown/white wire.

I will keep the existing setup and simply connect the regulator black output to the brown/white wire.

Not sure what wattage the regulator is rated at, but its a Wassel 3 phase type.