SIGNAL GND
EXT ALC GND TX REQ

REAR PANEL CONNECTORS

DATA Jack

This 6-pin, mini-DIN jack accepts AFSK input from a Ter- minal Node Controller (TNC); it also provides fixed-level Receiver Audio Output, Push-To-Talk (PTT), Squelch Sta- tus, and ground lines.

SQL

DATA OUT

1200bps

 

DATA OUT

PTT

9600bps

 

GND

DATA IN

DATA

ACC Jack

This 3.5-mm 3-pin jack accepts external ALC (Automatic Level Control) voltage from a linear amplifier on the tip connection, and accepts a “Transmit Request” command on the ring connection. The main shaft is the ground return.

The “TX Request” connection, when shorted to ground, puts the FT- 857 into the transmit mode, and sends out a steady CW carrier, for

linear amplifier or manual antenna tuner adjustment.

KEY Jack

This 3.5-mm, 3-pin jack is used for connection to a CW keyer paddle or a straight key.

EXT SPKR Jack

This 3.5-mm, 2-pin jack provides variable audio output for an external speaker. The audio output impedance at this jack is 4 W ~ 16 W and the level varies according to the setting of the front panel’s AF control.

144/430 MHz Antenna Jack

Connect your 144 and/or 430 MHz antenna’s 50 W coaxial cable to this M-type (“SO- 239”) connector.

HF/50 MHz Antenna Jack

Connect your HF and/or 50 MHz antenna’s 50 W coaxial cable to this M-type (“SO- 239”) connector.

KEY GND

DOT

DASH

 

 

KEY GND

DOT COMMON

DASH

COMMON

FT-857 Operating Manual

33

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Image 35
Vertex Standard FT-857 manual Data Jack, ACC Jack, KEY Jack, EXT Spkr Jack, 144/430 MHz Antenna Jack
Page 34 Page 36

FT-857 specifications

The Vertex Standard FT-857 is a compact and versatile all-mode transceiver that has become popular among amateur radio operators since its introduction. With its ability to operate in VHF, UHF, and HF bands, the FT-857 caters to a diverse range of communication preferences and provides exceptional performance for both mobile and base station applications.

One of the key features of the FT-857 is its coverage of a broad frequency range, spanning from 160 meters to 2 meters and covering the 70 cm band. This wide frequency coverage allows amateur operators to communicate with fellow enthusiasts across various bands, ensuring versatility in operational environments. The FT-857 offers an output power of up to 100 watts on HF and 50 watts on VHF/UHF, providing sufficient power for effective communication, whether in local or distant contacts.

Another distinctive characteristic of the FT-857 is its all-mode capability. It supports various modes of operation, including SSB, CW, AM, and FM, making it suitable for different operating styles and preferences. The inclusion of advanced digital signal processing (DSP) technology enhances audio clarity and offers noise reduction features, which are crucial in crowded bands. This DSP capability also aids in improving signal quality and overall communication experience.

Portability is a significant advantage of the FT-857. Its compact size and lightweight design make it an excellent choice for field operations and portable setups. Additionally, the transceiver is well-equipped with features such as built-in memory channels, allowing users to save and quickly access frequently used frequencies. The FT-857 also includes a built-in automatic antenna tuner, which makes it easier for operators to set up and optimize their antenna configurations without requiring additional external devices.

The FT-857 is designed with user-friendly controls and a clear LCD display, enabling operators to quickly adjust settings and monitor communication details without confusion. The visibility of the display is especially vital for use in different lighting conditions, ensuring that users can operate efficiently whether in bright sunlight or low light conditions.

In summary, the Vertex Standard FT-857 is a highly capable, compact transceiver that offers an effective solution for amateur radio communication. With its all-band, all-mode capabilities, robust DSP technology, and user-friendly design, the FT-857 remains a popular choice for both enthusiasts and professionals alike, facilitating engaging communication experiences across multiple bands and modes.
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