Ford ignition resistor

[Bruce Parker (RIP)]

I learned something new today, or at least noticed if tor the first time. I'm tuning up the carrier and replaced the ignition resistor in the dash. The carrier is running all the original spark parts and has the early 'diver's helmet' distributor, 6V positive ground.

Checking the voltage across the resistor it went from 6V in to maybe 1.5V out. But wait, aren't these supposed to step down from 6 to 4 volts? I hooked everything back up and so far it's starting on the first push of the starter button every time (I know Rob, shocking for a Ford, but at least no oily mess to mop up). There was a distinct new burning smell which dissipated quickly and, on checking the voltage across the resistor while running (I won't lie, it had me worried) it read a healthy 4 volts.

So do these things need to break in? Do they need to warm up? The resistor is not WW2 NOS. It's one of those Mac's Auto new ones that needs a little filling to fit the original bracket.