wolfgang, do you have access to a voltmeter?
from your utube, I think you might have a bigger problem than the normal amp meter waving.
from what I have read recently, IF it were me, given I sort of know how alternators/regulators work, I would put a swtich and one of those small audio "stiffing" capacitor on the altenator field terminal. those caps are about $10 at an electrical parts store. But with out watching voltage you could over charge the battery.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.