Picture of product TAF550

Part #: 960200-1-000

Model: TAF550




VHF/AM/FM Base Station

Part Number :




  • VHF/AM/FM Modular Communications System
  • Transportable AM and FM base station
  • Capable of operating simultaneously on any 25 kHz VHF/AM aeronautical band frequency
  • Power can be external 120 VAC, 12 VDC, or 24 VDC
  • Both transceiver modules utilize state of the art microprocessor controlled frequency synthesis techniques to provide communications on every currently available channel
  • Mounted into a rugged transportable case with protective covers (front and rear) into which the accessories (microphone, power cables, antenna cable, etc.) can be stored
  • Intended for temporary, emergency or backup operation in a fixed environment
  • The FM transceiver incorporated is the Technisonic TFM-138B
    • Can be operated in the Direct Entry or Simplex mode by simply keying in the desired operation frequency, or can function without restriction on any split frequency pair within the band
    • 120 preset memory positions each of which is capable of storing a receive frequency, a transmit frequency, a separate CTCSS tone for each receive and transmit frequency and an alpha numeric identifier for each channel
    • Allows for DPL or DCS coded squelch operation
    • Allows either 25 kHz wide band or 12.5 kHz narrow band operation on any or all of 120 preset channels
    • Data can be easily entered into any of the preset non-volatile memory positions for both main and guard channels via the front panel keyboard
    • Information stored in memory is available for instant recall by keypad entry, or by pressing the UP or DOWN button which allows the operator to scroll through all preset channels
    • Features a synthesized two channel guard, receiver, a DTMF encoder for signaling during transmit, and a scan function which will scan any or all of the frequencies stored in the preset memory positions
  • The VHF/AM transceiver incorporated is the Technisonic high-performance 91-DE
    • Allows the operator to store up to 10 channels in non-volatile memory which are displayed on a front panel liquid crystal display, and then easily recall, seek, or scan them
    • Receive only channels to prevent unauthorized transmission as well as a 90 second time out feature are easily programmed via the front panel 12 button key pad
    • The highly sensitive and selective receiver provides for superior long distance communication
    • 35 dB Rx and Tx audio compressor maintains constant audio level and modulation
    • User adjustable squelch and external headset jack are conveniently located on the front panel
    • Noise cancelling dynamic microphone (included) provides for clear audio even in a high noise environment


  TIL 91-DE (VHF/AM)   TFM-138B (VHF/FM)
Frequency Range: 117.975 to 138.000 MHz   138.000 to 174.000 MHz
Tuning Increments: 25 kHz    2.5 kHz
Operating Mode:     F3E simplex or semi-duplex
Channel Spacing: 25 kHz   12.5 kHz, 25 kHz or 30 kHz as per applicable FCC and DOC spec.
Memory Positions: 10   120 channels
Dimensions: Approx. 8.5" x 10.25" x 2.75"                Approx. 8.0" x 3.0" x 5.75" 
Weight: 3.5 lbs.   3.1 lbs. (1.4 kg)
Temperature Range: -40°C to +60°C    -40°C to +60°C
Certification: FCC and DOC Type approved    FCC and DOC Type approved
Guard Receiver: N/A   2 channel synthesized 
CTCSS Squelch Capability: N/A    Encodes/decodes all 63 available tones
DPL/DCS Capability: N/A   Encodes/decodes all avail digital sq codes
DTMF Encoder: N/A   All standard DTMF tones available
Audio Output: 100 mw into 600 ohms   500 mw into 600 ohms
Speaker Output: 3 Watts min   2.5 Watts into 4 ohms
Back Lighting: N/A   28V (standard) or 5V (specify)
Display: Liquid Crystal   Green (standard), red (optional)
Sensitivity at 12 dB Sinad: Better than 1.5 microvolts    Better than 0.35 microvolts
Adjacent Channel: At least 80 dB   -75 dB for 25 kHz, -70 dB for 12.5 kHz
Spurious Attenuation: At least 90 dB   -90 dB below carrier
Third Order Intermod: At least 67 dB   -70 dB
Image Attenuation:     -80 dB
FM Acceptance:     ±6 kHz
Hum and Noise: Better than 40 dB   Better than 50 dB
Audio Distortion: Less than 3.5%   Less than 5%
Ant Conducted Emission:     Less than -70 dBm
RF Power Output: 7 Watts nominal   1 Watt or 10 Watts
Output Impedance 50 ohms   50 ohms
Maximum Mod/Deviation Up to 95%   Limited to 2.5 kHz for 12.5 kHz channels and 5 kHz for 25 kHz channels
Spurious Attenuation: -60 dB below carrier   -90 dB below carrier level
Frequency Stability: ±0.00025%   ±0.00025%
Microphone Circuit: Dynamic microphone   Carbon or equivalent
Harmonic Attenuation: -60 dB   -65 dB below carrier level-40 dB
FM Hum and Noise: -50 dB   -40 dB
Audio Input: 50 mV to 2V rms   50 mV into 200 ohms
Audio Distortion: Less than 5%   Less than 5%
Part Number: Description:
TAF-550 VHF/AM/FM Base Station


- VHF/AM/FM Base Station
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