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Yaesu Ft 857D User Manual3/21/2021
If you connect pin-3 (BATT SENS) of the DC power jack to the ground, the FT-857 automatically switches to 20 Watts (430 MHz: 10 Watts) of output power.
Yaesu Ft 857D User Manual PECIFICATIONS DoubleFT-857 Operating Manual PECIFICATIONS Double-Conversion Superheterodyne (SSBCWAMFM) Superheterodyne (WFM) 1st: 68.33 MHz (SSBCWAMFM); 10.7 MHz (WFM) 2nd: 455 kHz SSBCW 100 kHz-1.8 MHz.Avoid heating vents and window locations that could expose the transceiver to excessive direct sunlight, especially in hot climates. These safety tips apply to any device installed in a well-designed amateur radio station. Always observe proper polarity when making DC connections: The Red DC power lead connects to the Positive () DC terminal; and the Black DC power lead connects to the Negative () DC terminal. If the battery is not charged sufficiently to maintain at least 11 Volts at the radio, erratic operation or shut-down may occur. Bonding the rear panel Ground lug of the FT-857 transceiver to the vehicle or vessels ground system should clear up any such difficulties. Improper Ground Connection Proper Ground Connection Transceiver Linear Power Transceiver Linear Power Amplifier Supply Amplifier Supply Daisy Chain FT-857 Operating Manual. The HF50 MHz ANT jack is used for HF and 50 MHz, while the 144430 MHz ANT jack is used for 144 MHz and 430 MHz. Always use a balun or other balanc- ing device so as to ensure proper antenna system performance. If a lightning storm is in progress in your immediate area, do not attempt to disconnect the cables, as you could be killed instantly if lightning should strike your antenna structure or a nearby power line. Yaesu Ft 857D User Free To DrawThe cooling system of the transceiver must be free to draw cool air in from the side of the transceiver and expel warm air from the rear of the transceiver. The ring connection of the ACC jack, when closed to ground, places the FT-857 into the transmit mode, and sends a steady CW carrier, for amplifier (or antenna tuner) adjustment purposes. The key-up voltage of the FT-857 is 5V, and the key-down current is only about 1 mA. Simply fold both feet forward to raise the front of the transceiver, and fold them back against the bottom case to lower the front of the FT-857. And during FM reception, this indicator will glow blue when a signal is received with a CTCSSDCS tone matching that to which your transceiver is set. Liquid Crystal Display The Liquid Crystal Display (LCD) provides indication of the operating frequency and other aspects of transceiver status. METER Jack This 3.5-mm 2-pin jack is used for connection to an analog meter (not produced by Vertex Standard). SPPH Jack This 3.5-mm, 2-pin jack provides variable audio output for an external. Press and hold in this key for one second, while on a recalled channel, to open Menu No.- 056, for quick programming of an Alphanumeric Tag. C Key Press the C key to select the recovery time (Slow, Fast, or Auto) for the receivers AGC system. You may program the configuration of this key via Menu Item No- 067 PG C.
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