The alternator whine on 2m is my primary target, heres what Ive done so far:
5 snap-on chokes around the alternator control wires.
I have 2 large square/cube shaped snap-on chokes, so i have one on each DC lead (from radio), wrapping the wires 2 or 3 times around them.
How about a capacitor of a few mf right on the alternator? those snap on chokes wont do any thing at about 1000hz and that's where that ripple frequency is at.
You may need one on the stator winding wire too "if you have one"