MG
The Classic Marque

The social media ban for under 16s is effectively 'digital ID' by the backdoor.

You beat me. Lol

Ah yes, the field coil. Thanks Bill. It'd be interesting to scope the output. But presumably the battery would flaten it anyway; -- wouldn't it? -- But you said it already.

Interesting stuff. �

I better elaborate - alt output is initially pulsed but the battery will normally smooth it out. If a rectifier or regulator diode failed open circuit then output will be weaker and more pulsed because a phase would be missing.

My goodies have arrived.

Ordered yesterday, arrived just now. Pretty good, esp' as not expensive at all.

If it all goes to plan, I'll have 3 working alternators. I'll have one in use and two spares, -- a consequence of the new China alt's supplier not wanting the faulty one back. I can only assume it's not financially viable to have it returned and repaired.

Maybe I'll sell on...

The field diodes don't feed the rectifier, they feed the field coil which grounds via the regulator. The regulator is a switching transistor which repetitively switches on and off between field and ground. This, in effect, controls alternator voltage by alternately building and collapsing the field magnetic flux (like the electromagnetic reg on a dynamo regulator) which causes the stator output ...

Is this bbs considered 'social media' ?

If so, ----

"UK social media ban plans revealed: Ofcom outlines the four ways teens will be able to prove they're over-16 when new rules come into force next year"

Will we have to show ID and prove who we are and prove our ages, to continue to use this and other bbs?

Will we be kicked off here, and faceache if we don't comply?

Interesting.

Now I understand a bit more, -- I think.

Only one of my field diodes is kaput, open circuit.

So the remaining 2 diodes feed only two of the phase voltage peaks to the rectifier, resulting in a lower output voltage at lower rpm.

Then, as the rpm increases, up to circa 3500 engine rpm, the voltage increases just about sufficiently to turn off the cha...

Yep exactly that David.

It's one of my field diodes that has failed, and I wonder if it may have survived had there been a protective surge diode.

I've got a surge diode on one of my older 'faulty' alternators (likely just the worn outer brushes), the one with broken lugs. Maybe I could/should add it to my good spare. Opinions?


I found this very useful description....

Not on benefits, or working in the public sector.

So the surge protection device shown in figure 7 of the Lucas ACR manual is to prevent the armature voltage rising to high and producing damaging output from the field windings. A penny pinching move?, remove it as in most cases not needed?