The Technisonic TFM-138B is a frequency agile airborne VHF/FM High Band transceiver operates from 138.000 MHz to 174.000 MHz in 2.5 KHz steps, providing for either 12.5 KHz (Narrow Band) or 25.0 KHz (Wide Band) channel spacing.

The TFM-138 offers a two-channel synthesized Guard Receiver (no crystals), 120 channels of preset memory, scan and priority scan, all available CTCSS tones, all DPL/DCS codes, PC uploading and downloading and can operate without restriction on any split frequency pair available within the band. Function control is via a panel mounted 12-button keypad. Operating frequency, alpha-numeric identifier and other related data are presented on a 48-character, two-line LED matrix display. This transceiver weighs just 3.1 lbs., is Dzus panel mounted and is completely self contained (no heavy remote transceiver), eliminating problematic, complicated, heavy and costly R/T to control head interconnect wiring. The TFM-138B is compliant with current US Forest service contract requirements and is in use with USFS and US Army National Guard helicopters. AWR copies available on request.