The FT-5100 is a mobile dual-receive and cross-band full duplex amateur transceiver descending directly from the FT-5200, including most of its features and adding some of its own. Miniaturization technology allows a built-in antenna duplexer, dual full-frequency liquid crystal display (with signal strength bargraph for each display channel), 8-level automatic display/button lighting dimmer, and now dual receive capability on two channels on different bands, or in the same band. An efficient thermally-switched cooling fan allows up to 50 watts VHF and 35 watts UHF output. Ninty-four freely tunable memories (forty-seven per band) offer complete programmability and scanning functions, such as independent transmit and receive frequencies, programmable repeater offsets and two scan ranges on each band, selectable scan resume modes and memory skip, priority monitoring and 1-touch instant-re-call CALL channels for each band. Channel steps are user-selectable, and Automatic Repeater Shift can be activated to automatically set standard repeater shifts when tuning to repeater subbands (where applicable). Versions are available with microphone button control of a 1750-Hz burst generator (with the MH-26d8 or MH-26e8 Speaker/Mic), VFO/memory or band selection. The MW-1 Wireless Microphone/Controller option duplicates the controls (including volume and squelch), adding a dtmf (Dual-Tone, Multi-Frequency) keypad and microphone. You can select a 3-digit ID code and your receiver stays quiet until your code is received (from any DTMF-equipped transceiver). You can also have a code open the squelch or a ring like a telephone. PAGE mode displays the caller’s code so you know who is calling. One-touch paging transmits paging codes whenever the PTT switch is pressed, if desired. Four banks of seven 3-digit code memories each store your ID plus that of the calling station and those of five other stations or groups for calling/monitoring (autopatching requires the MH-26F8 or MH-27b8 DTMF keypad microphone, or the MH-15d8 with its own auto-dial dtmf memories). A 38-tone programmable CTCSS (Continuous Tone-Coded Squelch System) encoder is built-in, and CTCSS tone squelch operation on both receiving channels is available with the FTS-22 Dual Band CTCSS Decoder option, which also provides a telephone-type CTCSS Bell alerting function.