Read the forum archivePlease read the forum archive, you can search on "Fisher" and read a good deal of information about the vintage Fisher gear.
Fisher 400 - Last all-tube design. FM mono/stereo only, no AM tuner. Has headphone jack.
Fisher 500B - AM/FM receiver. No headphone jack. Required optional FM multiplexer board for FM stereo.
Fisher 500C - AM/FM receiver, has headphone jack.
Fisher 800B/C - Probably the largest most ambituous all-tube receiver ever built. Features separate AM/FM tuners and tuning dials originally designed for an early form of stereo broadcasting that combined AM (L - R) and FM mono (L + R) signals to achieve true stereo. Features one of the finest AM tuners ever made. I believe the 800C has a headphone jack, not sure about 800B.