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YAESU - FT-857D - HF/50MHZ/VHF/UHF

FT-857D

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The FT-857D, the world's smallest HF/VHF/UHF mobile transceiver, provides base station-type performance from an ultra-compact package that's ideal for mobile or external battery portable work.

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784,00 €


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Wide frequency coverage, outstanding receiver performance, and the convenience of optional remote-head operation make the FT-857D the expert's choice for high-performance mobile operation!

User manuals PDF

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Ultra Compact Design
Measuring just 6.1” x 2” x 9.2”, the FT-857 is the world’s smallest HF/VHF/UHF up to 100W multimode transceiver! Its rugged case design is a masterpiece of ergonomic design, with often-used switches and knobs conveniently positioned for easy access.
High-Performance Receiver Design
Building on the acclaimed performance of the FT-1000D, Mark-V FT-1000MP, and FT-897, Yaesu’s engineers have crafted the FT-857’s front end for a very low noise floor, along with wide dynamic range. Utilizing an up-conversion architecture for HF with a first IF of 68.33 MHz, the FT-857 features a double-conversion superheterodyne system (triple conversion on FM), with the 2nd IF at 10.7 MHz. Extensive bandpass filtering in the front end, along with careful device selection and gain distribution, yield a receiver system ready for the strong-signal challenges of today’s crowded bands!
Wide Frequency Coverage
Providing transmitter coverage of the HF, 50 MHz, 144 MHz, and 430 MHz Amateur bands, the FT-857 also includes receive coverage on 100 kHz to 56 MHz, 76 to 108 MHz, 118-164 MHz, and 420-470 MHz. Enjoy the excitement of public safety monitoring, along with weather broadcasts, AM and FM broadcasts, aviation communications, as well as the action on the Ham bands!
Versatile Memory System
The FT-857 provides up to 200 “Main” memory channels, each of which may be named with an Alpha-Numeric label of up to eight characters. These 200 Memories may be separated into as many as 10 Memory Groups of 20 Memories each. For added convenience, you also get a “Quick Memory” and a “Home Channel” on each band, plus ten pairs of band-limit memories, to let you restrict operation to a sub-band, if you like.
Digital Signal Processing (option)
For superior interference rejection and transmitter “talk power,” the FT-857’s optional DSP circuitry enhances both sides of the communications circuit. The FT-857’s DSP Unit features a 24-bit high-tech D/A chip for signal processing. Included are Bandpass Filter, Auto-Notch, and Noise Reduction filters, along with a Microphone Equalizer.
Big Radio Tuning Dial and Outstanding Ergonomics
Ease of operation of the FT-857 is enhanced by the large-diameter (1.7”) Main Tuning Dial, similar in size to the tuning knob of many base station rigs. Selectable tuning steps of 2 kHz/4 kHz per revolution allow easy navigation around your favorite bands, while important keys and switches are strategically placed around the front panel for quick access.

Reviews

Grade 
06/30/2016

avis ft857

Les platines de cet appareil sont identiques au ft897d.
L'appareil est hyper complet, idéal pour les vacances, rien ne manque: HF VHF UHF
En cw, c'est intéressant de voir la diode led bleue s'illuminer au rythme de la cw lorsque on est parfaitement centré sur la fréquence du correspondant.

l'usage du filtre collins 350hz est un plus en cw.
Si on fait de la cw simplement avec le filtrage dsp, l'alc réagirira sur une bande passante if de 3 KHz (ssb).
Donc le signal cw faible que vous écoutez risque de disparaitre au rythme par exemple d'une cw qui se trouve à 2 KHz de là.

Le "ringing" de ce genre de filtre mécanique collins est moins important que sur les anciens postes, qui disposaient de filtres cw à quartz. L'écoute est donc un peu plus agréable avec filtre collins plutôt que filtre à quartz.

La puissance est stable, facilement accessible si on adresse les dernières touches du menu, au programme 75.Ce qui permet de changer la puissance en vhf ou uhf rapidement suivant les besoins.

On peut aussi assigner à une des trois dernières touches du menu, un accès rapide à la vitesse du keyer.

Les fiches mini din à l'arrière permettent d'avoir acces à pas mal de connexions permettant de commander différentes interfaces, comme par exemple une commande pour l'antenne australienne codan.

Sur la série ft897 et ft857, il vaut mieux utiliser le micro d'origine dynamique, ou un autre de type dynamique plutôt qu'un micro électret.
le micro électret que l'on peut acheter à part, à tendance à donner des phénomènes d'accrochages et de détection directe lors d'émissions en HF en SSB, rendant parfois le signal déformé et incompréhensible.

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YAESU - FT-857D - HF/50MHZ/VHF/UHF

YAESU - FT-857D - HF/50MHZ/VHF/UHF

5year_warranty.png

The FT-857D, the world's smallest HF/VHF/UHF mobile transceiver, provides base station-type performance from an ultra-compact package that's ideal for mobile or external battery portable work.