The 1977 FT-101FX extreme economy FT-101F type had all FT-101F specifications except speech processor (available as an option), DC converter for mobile use (available as an option), microphone, DC cord, or 160M crystal, 10A crystal only.
The 1977 FT-101FX extreme economy model of the FT-101F type was a variant that lacked certain components like a speech processor, DC converter, microphone, DC cord, or a specific crystal type (160M or 10A).