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Yaesu FT-857
Specifications

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Amateur HF Transceivers 

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FT-857 Specifications

GENERAL
Frequency Range: Receive:
0.1-56, 76-108, 118-164 and 420-470 MHz
Transmit:
160 - 6 Meters
0
2 Meters
0
70 Centimeters (Amateur bands only)
0
5167.5 kHz: Alaska Emergency Frequency
0
(U.S.A. version only)
Emission Modes:
A1 (CW), A3 (AM), A3J (LSB/USB),
0
F1 (9600 bps Packet), F2 (1200 bps Packet), F3 (FM)
Synthesizer Steps (Min.):
10 Hz (CW/SSB), 100 Hz (AM),
0
100 Hz (FM), 100 Hz (WFM)
Antenna Impedance:
50 Ohm, Unbalanced
Operating Temp. Range:
-10 °C to +60 °C (14 F to 140 F)
Frequency Stability:
Better than 4 ppm (-10 °C to +50 °C)
0
 
Power Requirements:
DC 13.8V 10 %, Negative Ground
Current Consumption:
Receive (Squelched) : 0.55A,
0
Receive (Max. Audio) : 1A
0
Transmit : 22A (@ 100W RF output)
Case Size:
6.1" (W) x 2.0" (H) x 9.2" (D) (155 x 52 x 233 mm)
Weight:
4.6 lb. (2.1 kg.)
0
TRANSMITTER
Power Output:
160 - 6m : 100 Watts (25 Watts AM carrier)
0
2m : 50 Watts (12.5 Watts AM carrier)
0
70cm : 20 Watts (5 Watts AM carrier)
Modulation Types : SSB:
Balanced Modulator
FM:
Variable Reactance
AM:
Early Stage (Low Level)
FM Maximum Deviation:
5 kHz (2.5 kHz on FM-N)
Spurious Radiation : Harmonics:
At least 50 dB down (1.8 - 29.7 MHz)
At least 60 dB down (50/144/430 MHz)
0
Non-harmonic:
At least 50 dB down (1.8 - 29.7 MHz)
0
At least 60 dB down (50/144/430 MHz)
Carrier Suppression:
At least 40 dB
Opp. Sideband Suppression:
At least 50 dB
SSB Frequency Response:
400 Hz - 2600 Hz (-6 dB)
Microphone Impedance:
200 - 10 k Ohm (Supplied microphone: 2 k Ohm)

 

RECEIVER
Sensitivity:
SSB/CW AM-N FM
100 kHz - 1.8 MHz (IPO off):
- uV 32 uV -
1.8 - 28 MHz:
0.25 uV 2 uV -
28 - 30 MHz:
0.2 uV 2 uV 0.50 uV
50 - 54 MHz:
0.125 uV 1 uV 0.2 uV
144/430 MHz:
0.125 uV - 0.2 uV
SSB/CW/AM-N figures are for 10 dB S/N, 12 dB SINAD on FM

 

Squelch Sensitivity : SSB/CW/AM FM
1.8 - 28 MHz : 2.5 uV -
28 - 30 MHz : 2.5 uV 0.32 uV
50 - 54 MHz : 1 uV 0.16 uV
144/430 MHz : 0.5 uV 0.16 uV

 

Intermediate Frequencies : 0
1st IF : 68.33 MHz (SSB/CW/FM/AM)
0 10.7 MHz (W-FM)
2nd IF : 455 kHz
Image Rejection : Better than 70 dB (1.8 - 30 MHz, 50 - 54 MHz)
00 Better than 60 dB (144 - 148 MHz, 430 - 450 MHz)
IF Rejection : Better than 60 dB
Selectivity (-6 / -60 dB) : 0
SSB/CW : 2.2 kHz/4.5 kHz
CW : 500 Hz/2.0 kHz (Optional YF-122C installed)
CW-N : 300 Hz/1.0 kHz (OptionalYF-122CN installed)
AM : 6 kHz/20 kHz
FM : 15 kHz /30 kHz (-6 / -50 dB)
Audio Output : 2.5 W into 4 Ohm @ 10% THD
Audio Output Impedance : 4 Ohm - 16 Ohm
0
Specifications are subject to change without notice, and are guaranteed within amateur bands only.

Copyright 2003, Universal Radio, Inc.