TRC-457 AM/SSB CB Transceiver
(210-1580)                 Specifications             Faxback Doc. # 46665

General:

Channels: ........................ 40 Channels for AM, Upper Side Band and
                              Lower Side Band, utilizing Digital Circuitry

Frequency Range: ................................ 26.965 MHz to 27.405 MHz

Frequency Control: ................. Digital (Phase Lock Loop) Synthesizer

Frequency Accuracy: ........................................... +/- 100 Hz

Operating Temperature Range: ....................... -20 to + 50 degrees C

Power Requirements: ................ 13.8V DC (12-16 volts DC, negative or
                                       positive ground) or 120V AC (60 Hz)

Antenna: ...................................... 52 Ohm (Coaxial connector)

Microphone: ......................................... 600 Ohm Dynamic Type

Speaker: ................................................. 8 Ohm, 2.5 Watt

Clock: ........................................ Digital Type (solid state)

Size (HWD): ..................... 4 x 15 x 11.5 inches (10 x 38 x 29.2 cm)

Weight: ....................................... 16 lbs. (approx.) (7.3 kg)

Accessories: .............. AC Cord, DC Cord with in-line Fuse, Microphone
                               and Microphone Hanger and Mounting Brackets
Receiver:

Max Sensitivity: ........................................... AM 0.5 microV
                                                           SSB 0.25 microV

Sensitivity for 10 dB S/N: ....................... AM 0.5 microV or better
                                                  SSB 0.5 microV or better

AGC Figure of Merit 50 mV for 10 dB Change in Audio Output: ..... AM 90 dB
                                                                 SSB 80 dB

Overload AGC Characteristics from 10 mV to 100 mV: ............ AM +/-3 dB
                                                               SSB +/-3 dB

Overall Audio Fidelity at 6 dB Down: ..................... 300 to 2,100 Hz

Adjacent Channel Selectivity: ................................... AM 70 dB
                                                                 SSB 70 dB

Image Rejection (42.6 MHz): .................. Typically better than 80 dB

IF Rejection: ...................................................... 90 dB

Maximum Audio Output Power: ...................................... 5 Watts

Squelch Range: ................... AM - Adjustable from 0.5 microV to 1 mV
                                 SSB - Adjustable from 0.25 microV to 1 mV

Receiver Clarifier Range: ......................... +/- 1.25 kHz, variable

Battery Drain at no Signal: ............................. Less than 700 mA

Battery Drain at Max. Output Power: ................... Less than 1,600 mA

AC Power Consumption: ............................ At no Signal = 40 Watts
                                           At Max. Output Power = 60 Watts

Transmitter:

Max. Output Power: ........................................ AM 4 Watts FCC
                                                          SSB 12 Watts FCC
Spurious Emission: ....................................... 65 dB or better

Modulation Frequency Response: (1 kHz, 0 dB reference)
                               Lower at 450 Hz, EIA: ............ AM -6 dB
                                                                 SSB -6 dB
                              Upper at 2.5 kHz, EIA: ............ AM -6 dB
                                                                 SSB -6 dB
Microphone Sensitivity:

    AM: For 50% Mod: ........................................... AM 0.4 mV
    SSB: for 4 Watts PEP: ..................................... SSB 0.4 mV

Microphone Amplifier Circuit:

    Dynamic Range: ............. AM 60 dB (between 98% and 80% modulation)
                             SSB 60 dB (between 12W P.E.P. and 10W P.E.P.)

Battery Drain: ............................ At no Modulation - AM/2,000 mA
                                                              SSB/1,600 mA

                                        At Max. Output Power - AM/3,000 mA
                                                              SSB/2,500 mA

AC Power Consumption: ..................... At no Modulation - AM/65 Watts
                                                              SSB/45 Watts

                                       At Max. Output Power - AM/100 Watts
                                                             SSB/100 Watts
Public Address Amplifier:

Maximum Output Power: ............................................ 6 Watts

WARNING:  To prevent fire or shock hazard, do not expose this Transceiver
          to rain or moisture.

Specifications are typical; individual units might vary.  Specifications
are subject to change and improvement without notice.

(BR/gw 04/07/98)

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