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Last modified 2022-09-25

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Yaesu FT-857

A picture of Yaesu FT-857

SPECIFICATIONS

GENERAL
Type:Amateur HF/VHF/UHF transceiver
Frequency range: TX: 10-160 m + WARC / 6 m / 2 m / 70 cm
RX: 0.1-76 / 118-164 / 420-470 MHz
Tuning steps:10 / 20 / 100 / 200 Hz, 2.5 / 5 / 6.25 / 9 / 10 / 12.5 / 15 / 20 / 25 / 50 KHz
Frequency stability: 4 ppm @ 25C (77F) during the first 60 minutes after power on
1 ppm / hour thereafter
0.5 ppm option (TCXO-9)
Mode:TX: AM / FM / NFM / SSB / CW
RX: AM / FM / NFM / SSB / CW / WFM
Channels / memory management: 200 regular with alpha tags
4 home
5 scan edge pairs (PMS)
Priority function
1 QMB
Non-volatile EEPROM storage
Repeater shift / offset:0-99.99 MHz
Power supply:13.8 VDC 15% (6-pin Molex connector on pigtail)
Current drain / power consumption:RX: 0.55-1 A
TX: Max 22 A
Antenna impedance / connector:50 ohm / One SO-239 and one N-jack (Europe) or two SO-239 (USA)
Dimensions (W*H*D):155*52*233 mm (6.1*2.05*9.17")
Weight:2.1 Kg (4.63 lb)
Other features: CTCSS/PL and DCS with tone search. Built-in keyer. Beacon mode.
Spectrum scope monitor. Detachable front panel. CW trainer.
32 color display. Dimmer. CAT control. Beacon feature. Cloning.
Attenuator (10 dB). NB. ARS. ARTS. 1K2 / 9K6 packet jack.
DSP option.




RECEIVER SECTION
Receiver system: Single conversion superheterodyne (WFM)
IF: 10.7 MHz
Double conversion superheterodyne (AM/FM/NFM/SSB/CW)
1st IF: 68.33 MHz
2nd IF: 455 KHz
Sensitivity: AM (10 dB S/N)
0.1-1.8 MHz: 32 uV
1.8-30 MHz: 2 uV
50-54 MHz: 1 uV
FM (12 dB SINAD)
28-30 MHz: 0.5 uV
50-54 MHz: 0.2 uV
2 m: 0.2 uV
70 cm: 0.2 uV
SSB/CW (10 dB S/N)
1.8-30 MHz: 0.2 uV
50-54 MHz: 0.125 uV
2 m: 0.125 uV
70 cm: 0.125 uV
Selectivity: AM:
6 KHz (-6 dB)
20 KHz (-60 dB)
FM:
15 KHz (-6 dB)
30 KHz (-60 dB)
NFM:
9 KHz (-6 dB)
25 KHz (-60 dB)
SSB/CW:
2.2 KHz (-6 dB)
4.5 KHz (-60 dB)
SSB (With optional YF-122S):
2.3 KHz (-6 dB)
4.7 KHz (-60 dB)
CW-N (With optional YF-122C):
500 Hz (-6 dB)
2 KHz (-60 dB)
CW-N (With optional YF-122CN):
300 Hz (-6 dB)
1 KHz (-60 dB)
Image rejection:HF/6 m: 70 dB
2 m/70 cm: 60 dB
AF output power / speaker:2.5 W at 10% distortion / 4 ohm
External speaker connector:3.5 mm, 4-16 ohm




TRANSMITTER SECTION
RF output power:

HF6 m2 m70 cm
AM:25 W25 W12.5 W5 W
FM:100 W100 W50 W20 W
SSB (PEP):100 W100 W50 W20 W
CW:100 W100 W50 W20 W
Modulation system:AM: Early stage (Low level)
FM: Variable reactance
SSB: Balanced modulator
Max FM deviation (Factory set):FM: 5 KHz
NFM: 2.5 KHz
Spurious emissions:HF: Better than -50 dB
VHF/UHF: Better than -60 dB
Microphone impedance / connector:200 ohm to 10 Kohm (600 ohm nominal) / 8-pin (Modular)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:2003-2004 (Discontinued)
Additional info:
Related documents: User manual (3.3 MB)
Service manual (12.8 MB)
Service manual v2018 (25.8 MB)
Modifications and fixes: Flickering squelch problem (194 KB)
Modification collection (1.2 MB)
Reviews:
Options / Accessories:
ATAS-100
ATAS-120
ATBK-100
CT-39A
CT-58
CT-62
DSP-2
FC-30
FP-1030A
MD-200A8X
MH-31A8J
MH-36E8J
MH-59A8J
MMB-82
TCXO-9
VL-1000
YF-122C
YF-122CN
YF-122S
YSK-857
Active-tuning antenna system
Active-tuning antenna system
VHF/UHF antenna base/counterpoise system
Packet cable
Band data cable
CAT interface cable
DSP unit
External automatic antenna tuner
AC power supply
Desk microphone
Hand microphone
Hand microphone with DTMF keypad
Remote control microphone
Mobile mounting bracket
TCXO unit. 0.5 ppm
Linear amplifier
Collins CW narrow filter. 500 Hz
Collins CW narrow filter. 300 Hz
Collins SSB filter. 2.3 KHz
Separation kit
A rear picture of Yaesu FT-857