A-circuit VR, bias resistor = ? ohms

Does anyone know what the resistance value (ohms) should be for the bias resistor between Field and Case on a new A-circuit voltage regulator? I'm using this on a '52 8N. Thanks.

20 Ohms, but just FYI, its function is not to 'bias' anything, but rather an arc suppressor across the field contacts.

I tend to call it a bias resistor as it is supplying low level field current when the contacts are open.

As per the dictionary # 5 definition concerning electrical applications:

Electronics: the application of a steady voltage or current to an active device, as a diode or transistor, to produce a desired mode of operation.

Since the resistor is supplying a connection from the field to ground and allowing current to flow .. that's a pretty fair comparison to a biasing element. Not a precise fit. but not a bad fit. ( i'm a 'think outside the box' kinda guy.. sometimes it's right outside the box.. sometimes it's way outside the box )

I be;ieve it's fair to call the field coil an active element since it is certaintly not a passive field.. like a permanent magnet would be. While the field foil is not a diode or transistor.. it is fitting the rest of the definition of how bias reads... IE.. current flow and active element.. etc.. And the result is a desired mode of operation. IE. low field current keep the closing field contacts from arcing as much.. plus provides for a lil smoother needle stabilization and less current spikes.. instead of going from 0 to hero. ( charge level ). it gets to go from 'low ' to higher..

That's how i characterize it anyway.

Nothing wrong with the definition or even as applied here. The naming I chose to use is related to its [u:51e8c5bdd1]primary[/u:51e8c5bdd1] function, i.e., to suppress the arc resulting from the inductive kick back/interruption of current in the fields(inductor), thus arc suppressor or snubber. Bias is a secondary or side effect, perhaps a useful one.

No arguments there on either function

I tend to think about condensers as switch debouncers, while they are also doing other things too.