Yaesu ft 857d manual espaol

Be certain to solder the connections at the splice securely, and provide ample insulation for the soldered splice heat shrink tubing plus black electrical tape work well. Check the battery terminal connections frequently to be sure they are tight and not corroded. When operating with the vehicle turned off, or operating from a stand-alone car battery in a camp site, etc.

Permanent damage can result if improper supply voltage, or reverse-polarity voltage, is applied to the FTD. The Limited Warranty on this transceiver does not cover damage caused by application of AC voltage, reversed polarity DC, or DC voltage outside the specified range of Never attempt to connect the FTD to a Volt battery system. When replacing fuses, be certain to use a fuse of the proper rating.

The FTD requires a 25A fast-blow fuse. The provision of an effective ground system is important in any successful communications station. A good ground system can contribute to station efficiency in a number of ways:.

It can minimize RF currents flowing on the shield of the coaxial cable and the chassis of the transceiver which may cause interference to nearby home entertainment devices or laboratory test equipment. It can minimize the possibility of erratic transceiver operation caused by RF feedback or improper current flow through logic devices. An effective earth ground system may take several forms; for a more complete discussion, see an appropriate RF engineering text.

The information presented below is intended only as a guideline. Inspect the ground system — inside the station as well as outside — on a regular basis so as to ensure maximum performance and safety. Due to unexpected resonances which may naturally occur in any location, improper communication system performance may result from insufficient grounding. These symptoms may include:. Note that these conditions may occur in any communications installation. The FTD includes extensive filtering designed to minimize the chance of such problems; however, random currents set up by insufficient RF grounding can nullify such filtering.

Such antennas frequently are responsible for the ground-related difficulties described above. Typically, the ground connection consists of one or more copper-clad steel rods, driven into the ground. Use a heavy, braided cable such as the discarded shield from type RG coaxial cable and strong cable clamps to secure the braided cables to the ground rods. Be sure to weatherproof the connections to ensure many years of reliable service. Use the same type of heavy, braided cable for the connections to the station ground bus described below.

Do not use gas line pipes in an attempt to provide a ground connection! To do so creates a serious risk of explosion!! An alternative station ground bus may consist of a wide copper plate single-sided circuit board material is ideal secured to the bottom of the operating desk.

Grounding connections from individual devices such as transceivers, power supplies, and data communications devices should be made directly to the ground bus using a heavy, braided cable. Do not make ground connections from one electrical device to another, and thence to the ground bus. See the drawings below for examples of proper and improper ground connections. The antenna systems connected to your FTD transceiver are, of course, critically important in ensuring successful communications.

Two antenna jacks are provided on the rear panel of the FTD. Guidelines for successful base and mobile station installations are shown below. On HF, signals propagated via the ionosphere develop mixed polarizations, so antenna selection may be made strictly on mechanical considerations; vertical antennas are almost always utilized on HF for this reason.

In mobile and portable installations, when vertical antennas are used, remember that the grounding of the base area of the antenna is critically important to proper operation. In a vehicle, if mounting the antenna to a door or hatch, it is recommended that you bond the door to the.

In portable operation, be sure to lay out radials or otherwise construct a n image plane for the vertical monopole ; it is not adequate simply to connect a vertical radiating element to the rear panel Antenna jack of this transceiver, without providing a suitable counterpoise.

Always use a balun or other balancing device so as to ensure proper antenna system performance. All efforts at providing an efficient antenna system will be wasted if poor quality, lossy coaxial cable is used. Losses in coaxial lines increase as the frequency increases, so a coaxial line with 0. As a general rule, smaller-diameter coaxial cables tend to have higher losses than larger-diameter cables, although the precise differences depend on the cable construction, materials, and the quality of the connectors used with the cable.

For reference, the chart below shows approximate loss figures for typicallyavailable coaxial cables frequently used in HF installations. Always locate antennas such that they can never come in contact with outdoor power lines in the event of a catastrophic support or power-pole structural failure. Install appropriate lightning arrestors in the antenna coaxial cables and rotator cables, if rotary antennas are used. In the event of an approaching electrical storm, disconnect all antenna lead-in, rotator cables, and power cables completely from your station if the storm is not immediately in your area.

Do not allow disconnected cables to touch the case of your FTD transceiver or accessories, as lightning can easily jump from the cable to the circuitry of your transceiver via the case, causing irreparable damage. 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.

The buried radials of a groundmounted vertical antenna can carry lethal voltages outward from the center of the antenna in the event of a direct lightning strike. This transceiver is capable of power output in excess of 50 Watts, so customers in the United States may be required to demonstrate compliance with Federal Communications Commission FCC regulations concerning maximum permissible exposure to radio frequency energy. Compliance is based on the actual power output used, feedline loss, antenna type and height, and other factors which can only be evaluated as a system.

Although there is negligible radio frequency RF leakage from the FTD transceiver itself, its antenna system should be located as far away from humans and animals as practicable, so as to avoid the possibility of shock due to accidental contact with the antenna or excessive long-term exposure to RF energy.

During mobile operation, do not transmit if someone is standing adjacent to your antenna, and use the lowest power possible. Never stand in front of an antenna during testing or operation when RF power is applied, especially in the case of MHz directional arrays. The 20 Watt power output supplied by the FTD, combined with the directivity of a beam antenna, can cause immediate heating of human or animal tissues, and may cause other undesirable medical effects.

Be certain to use only shielded cables for TNC-to-Transceiver connections. For further information, consult amateur radio reference guides and publications relating to RFI suppression techniques. The 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. Do not install the transceiver on top of another heat-generating device such as a linear amplifier , and do not place equipment, books, or papers on top of the transceiver.

Place the transceiver on a hard, flat, stable surface. The FTD provides the switching and drive-control lines required for easy interfacing to most all commonly-available amplifiers sold today. The main shaft is the ground return. The ring connection of the ACC jack, when closed to ground, places the FT into the transmit mode, and sends a steady CW carrier, for amplifier or antenna tuner adjustment purposes. MHz Antenna. To HF. To ANT 1. ANT 2. ANT 3. INPUT 1.

ALC 1. DC 48V IN. This line is not compatible with negative DC voltages, nor AC voltages of any magnitude. All commonly-available keyer paddles should work perfectly with the built-in Electronic Keyer.

The wiring configuration for the paddle is shown below. If a two-conductor plug is used, the key line will be constantly shorted to ground. The two front feet of the transceiver allow the transceiver to be tilted upward for better viewing. 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 FTD. AF Knob. The inner VOL knob adjusts the receiver audio volume level presented to the internal or external speaker.

Clockwise rotation increases the volume level. This detented rotary switch is used for VFO frequency tuning, memory selection, and function selection for the [A], [B], [C] keys of the transceiver. HOME Key. CLAR Key.

Pressing this key activates the Receiver Clarifier feature. FUNC Key. Multi Function Keys. These three keys select many of the most important operating features of the transceiver. You may scroll the display through 17 rows of functions available for use via the [A], [B], and [C] keys. The available features are shown in page Pressing either of these keys momentarily will change the operating mode. The selec-. DSP Button. The available functions will appear as the functions displayed above the [A], [B], and [C] keys, as described previously.

Pressing this key once more will return operation to the last-used Multi-Function Row the one in use before the DSP row was engaged.

This indicator glows green when the squelch opens, and turns red during transmit. During CW operation, this indicator will glow blue when an incoming signal is tuned to the center of the passband with IF Shift off. I have sent several radio to Yaesu for flashing after replacing blown processors.

From my experience, I don't believe Yaesu can do this. I believe they can only flash it with the software per the SN. W1TRY likes this. I'd be curious to see if Yaesu lists the cpu for the US model as a part. It may not be as simple as "flashing" firmware. I know that the cpu in my FTD and my Quadra are custom ASICs, not processors that run code contained in a separate storage device, and they do one job.

I tend to suspect the 8x7's are likewise. WE4E , Apr 9, WE4F, You are correct about older radios. The Ft had factory preprogrammed micros. The part number on the parts list was for a programmed part.

Solder it in and the radio will come to life. Some of you may have fixed the two way comm. Yaesu actually put their part number on the micro with "yaesu". However this is not true for , D, ,and D. I purchase these micros from Yaesu all the time. Voltage spikes take them out. If you look at the current service manual there is an asterisk in place of the part number for both the and D. The 's micro does have a different parts number because it is a "J" lead part. These micros are NOT preprogrammed from Yaesu.

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