Motorola voltage regulator

[silver72S]

Hello guys,
This is the back side of Motorola voltage regulator from 1972 911S.
Are these white poles with wires coils? What are these for?
You can see a disconnection on the upper coil.
Can you show us any options to replace it?

Thank you
Takahiro

[Richy]

Those are resistors . That voltage regulator is not available new . You can buy a new solid state regulator , works but not cosmetically correct .

[silver72S]

Richy,
Thank you for your reply.

Takahiro

[71gold]

For my 356 bought new solid state unit and transplanted into the original housing.
Sent both to rebuilder, worked great .
Not sure if that would work for this unit but worth a try.
Interested if anyone has done this for early 911’s

[silver72S]

71gold,
Thank you for your good idea. Im interested.

[30westrob]

I recently replaced the OE regulator on my 73S with a new solid state, HUCO brand, purchased from PP. The new regulator does a much better job of voltage regulation, and has eliminated my high voltage spike problem. Sometimes functionality trumps appearances. Rob

[silver72S]

Rob,
Thank you for the solid state regulator.
I am thinking to put the HUCO regulator into the original Motorola silver box.

Takahiro

[NorthernThrux]

The HUCO or OEM Valeo won't fit. I have it right now on the car. But the Hella one will fit as will a Bosch one. Both come in a similar housing to the original SEV Marchal/Motorola regulator and you can cut that open and stuff the contents into the original case. You will need to do some soldering on the leads. On my list for this winter. You can even put the wire wound resistors back on the bottom for complete aesthetics.

Any modern solid state regulator works a lot better than the old ones, so its worth the switch for functionality no matter what.

Ravi

[AKAMick]

If you can get the values for the failed resistor you could just replace it, those resistors are found on many external regulators used on many older domestic models, i would not be surprised if the resistors could be removed and used as replacements for yours.

[NorthernThrux]

The wire wound resistor that is broken in the first post should be 34.8 ohms. Get some nichrome wire and wind your own. It's easy. You can get rolls on Amazon for a few bucks and probably get a foot at an electrical supply place for a buck.

BTW, be careful. The white stuff that you wind the wire onto is asbestos.

Ravi