GM> All the auto regulators I've looked are linear. Switched would be
GM> more efficient, in fact the regulator on the aux generator of the
GM> diesel-electric loco that I looked at, apparently used phase
GM> control. But the effect is essentially the same.

RS> The older ones were mechanical. Relays
RS>switched the field in and out, IIRC. I
RS>wouldn't call those linear. ;^)

JE> Those went out in the late 50s - early 60s. From then on it
JE> was electronic types

 My `68 Mustang had one.

 TTYL.

 Robert

 * SLMR 2.1a * "Scotty! Quick, beam me aboard!""Aye, sir! A
2x4 or 2x6?"
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