[rotorwrench]

Alternators have the diode bridge to eliminate the need for a cut out. They only need a voltage regulator pole and a current limiter pole so the old ones are compact compared to a generator control unit. The modern solid state alternator control units can be pretty small so many are internal to the unit. The aircraft types have a trim pot to adjust voltage output but it's fixed on automotive stuff. They just have to have output within the acceptable range of operation.