Yaesu ft 857 output power. Wide frequency range

Yaesu FT-857D, the world's smallest mobile HF / VHF / UHF transceiver, provides high-quality characteristics of a stationary station in an ultra-mining package, is ideal for mobile execution and for portable performance with an external battery. A wide frequency range of KV transceiver Yaesu FT-857D, an excellent quality of reception and convenience of working with auxiliary remote control panel causes the confidence of specialists and provides high quality of work in a mobile version!

The new version of the FT-857D includes a range of 60 m (5 MHz), as well as a digital signal processing system (DSP)!

Before buying a kV transceiver Yaesu ft-857d Read its characteristics

Supermull size design

Yaesu FT-857 is the smallest multi-mode HF / VHF / UHF transceiver in the world with a large maximum power and size only 155 x 52 x 233 mm (6.1 x 2 x 9.2 inches)! The robust design of its body can serve as a sample of an ergonomic solution, with the convenient accommodation of frequently used switches and handles to quickly access them.

High quality desktop design

Based on the recognition of high quality FT-1000D models, Mark-V FT-1000MP and FT-897, Yaesu engineers created input stages of the FT-857 model with a very low level of own noise and a large dynamic range. Using the architecture with the conversion up for the HF range from the first IF 68.33 MHz, the transceiver is a super-energous system with a double frequency conversion (with a triple conversion for FM) with a second IF for 10.7 MHz. Powerful strip filtration in the input cascades, along with the competent selection of components and the amplification distribution, made it possible to implement the receiving system, ready to work in today's overcrowded ranges against the background of strong signals!

Wide frequency range

At the frequency range of the transmitter, covering the radio amatele HF radio domes, 50 MHz, 144 MHz and 430 MHz, kV transceiver Yaesu FT-857 also provides a reception in frequency bands of 100 kHz - 56 MHz, 76 - 108 MHz, 118 - 164 MHz and 420 - 470 MHz. Enjoy listening to public safety channels, as well as weather station, AM and FM radio broadcasts, aviation channels, and work in amateur radio lines!

Universal memory system

In the transceiver, up to 200 "main" memory channels are provided, each of which can be assigned a name using an alphanumeric tag containing up to eight characters. These 200 memory channels can be divided by no more than 10 memory bands for 20 channels each. For greater amenities, you can also define "fast memory" and "home channel" in each range, as well as ten pairs of memory cells for the ranges of ranges in order to be able to restrict work in the subband, if it is convenient for you.

Digital signal processing

To maximize interference and increasing the "conversation energy" during transmission, the transceiver uses an additional digital information processing system (DSP), providing quality improvement on both sides of the communication chain. In the FT-857D transceiver transceiver digital signal processing unit, a 24-bit high-quality digitalo-old microcircuit for signal processing is used. It includes a strip filter, an automatic slot filter and filters for weakening noise, as well as a microphone equalizer.

Large range of radio station settings and excellent ergonomic characteristics

The convenience of working with the transceiver increases, due to the scale of the main diameter of the large diameter (43 mm / 1.7 inches), similar to the sizes on the setting knobs of many stationary amateur radio stations. The ability to select a 2 kHz / 4 kHz setting steps per revolution provides simplicity of transition to favorite ranges, while important buttons and switches are located on the front panel to quickly access them.

Recruitment of the Yaesu FT-857D Transceiver:

Transceiver
User Instructions (English.)
User Instructions (Rus. Yaz.)
Microphone MH-31B8
Power cable for connecting to DC source
Fleece fuses

Steel core steel core hidden column ends with end plates. The joint panels of the wall and overlap of the collection-monolithic design. At the same time, hidden columns perceive a large share of effort caused by vertical and horizontal loads. The prefabricated frame of the first floor of a large-panel building or gas-called its table is performed from the monolithic or precast concrete. It is advisable to overlapping this installation to perform a collection-monolithic, capable of perceiving heavy loads and not to prevent the architectural and planning solution to the upper structure of a residential or public building. In the buildings of the combined system, unequal precipitation of foundations are exceptionally undesirable, which can cause significant redistribution of efforts in the columns of the first Thage, which may cause accidents. Therefore, the foundations for large-pointed, large-bedding, stone and other buildings with the skew floor are performed on the pile base. Principle of constructive solution of buildings with stone and concrete walls. Monolithic stone and concrete walls, depending on the structure of the building, are divided into four groups: carriers that perceive efforts from their own weight and external influences; Self-supporting, perceiving the load only on their own weight of the walls of all overlapping floors of the building and wind load; undessel, including hinged, perceive only the load from their own weight and wind load within one floor when it is height not more than 6 m; Partitions. electric shocker buy Moscow for free to order a gift electrooshoke.ru | Learn how to get an interview from the employer

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Comparison with others
We will not bother with technical details and measurements, it will make it without us. Now look at an interesting study of the characteristics of the receiver FT-857 and others, simply and clearly. We will deal with clean practices and apply the tool to us by God - ears, set two transceivers, we connect them to one antenna, set up for one frequency and compare our feelings from the heard. Having ears, let hear. The sixth of August in the RZ6HXA radio club was compared with IC-756PRO and FT-857D transceivers, one antenna in ranges 14 (yagi) and 7mgz. (LOOP). There were 5 people. In general, all noted a very good technique in 857, which in quality did not infer 756pro. Also, it was noted that 857 has a higher spectrum of received signals, most likely it is associated with a small speaker installed inside. When the external speaker is connected, the spectrum shifted at a lower side. I want to note separately that the FT-857D tested transceiver was partially modernized.

→ Comparison of FT-857D and Military Radio Station R-143: photo1. , photo2. . P-143 has significantly more noise and less dynamics.
→ Comparison FT-857D and IC-706: photo1. , photo2. . The sound is very different, the measurements were not produced, but it seems that the dynamics of 706 is smaller.
→ Comparison FT-857D and FT-857: photo1. , photo2. , photo3. . With the letter D sounds better.
→ Comparison of FT-857D and R-399A: No photos, a general impression, such that in 399 at 3.6 MHz mixer stuck stronger. They sound these devices in different ways. For 399 there are many modifications, so the question is open.
→ Comparison FT-857D (not converted) and TS-850: No photos, according to RA6FOT, TS-850 works better than 857, less noise, cleaner.
→ Comparison of FT-857D and Elecraft K2 :. Of course, K2 has higher characteristics and for DX-INGA and tests in tests is preferable. But 857 is made stronger.

Photo Gallery
On the Internet there are few photos that allow you to objectively assess all the advantages and disadvantages, to correlate the size of FT-857D, relative to the surrounding items. I decided to fix this gap and suggest you see photos made at different times and in different places. So, look: gallery 1. , gallery 2. , gallery EW6BN..

ATAS series antennas
For Mobile Lovers at KV, Yaesu produces two antennas that overlap the ranges from 7 to 29 MHz, 50-56 MHz, 144 MHz and 430 MHz with a sufficiently high efficiency. This type of antennas call Screwdriver Antenna, despite the small size, they are quite effective.

ATAS-25. Designed for hiking expeditions And configured on the desired frequency manually, it is installed on the ground or any smooth surface with a tripod. The weight of the whole design, just over 900g. The only drawback is the price. Reviews on Eham.net about ATAS-25, very good, there is experience in its use in a stationary, version on the balcony. Antenna length 2.2 meters. You can work with it 100W, so for the Yaesu 8x7 series and many other transceivers, it is suitable.

Antenna It has the same principle of operation, but it is automatic and installed on the car, it allows you to work on the KV-VHF directly in motion. Although nothing prevents using it on the balcony or roof of the building, in the stationary version. In order for the transceiver to work with the antenna, you need to make installation in paragraph 85, the main menu. The ATAS-120 installed a motor, for automatic tuning, power on it and control is fed by an antenna cable. If the antenna is installed correctly, it loses a bit of a full-size quarter-wave pin at 28 - 18 MHz, stronger at 14 - 10 MHz and substantially at 7 MHz. Working with FT-857D + ATAS-120 from the car is one pleasure, you do not need to follow the CWW when switching to other ranges, it is possible to fully focus on the QSO, especially if you drove to the dominant height and there are no metallic pins within a radius of 50 meters. ATAS-120, can not be installed on a magnetic base, it sharply reduces its efficiency! The practical description of the installation and operation of the antenna can be seen in the article "An F150 and Yaesu FT-857, ATAS-120 NO-DRILL INSTALL", which KG4ZQZ wrote. and on the RU0AU website. The length of the antenna varies depending on the frequency of 1.4 to 1.6 meters.

Although Yaesu does not guarantee the operation of the antennas on Wars ranges, in practice they work perfectly there, especially if you make resonant counterbalance, for each range. So, having any of the ATAS system antennas, you can operate on the ranges of 438 - 145 - 52 - 29 - 28 - 27 - 24 - 21 - 18 - 14 - 10 - 7 MHz, which is very good. Both antennas, one socket for all ranges, so when working to the VHF, you need to connect the cable from the antenna to the VHF to the transceiver. To manually do not overpow the cable - use an external diplexer.

Despite the fact that ATAS-25 and ATAS-120 antennas, short (2.2 and 1.6m. Respectively)they are quite effective, this is achieved due to the fact that there are no matching devices between the antenna and the transceiver (who inevitably lower the efficiency), as well as at the expense of a short cable (usually up to 10 meters), Losses in which you can neglect. The adjustment in the resonance is carried out by one single coil, which is part of the antenna and itself emits energy to ether.

But the opinion of RV6ab, about working with an antenna ATAS-120, during expeditions:

How many antenna itself and your impression about it consumes?
... at the time setting the ATAS-120 antenna, my ft897 ate about 3a. The overall impression of the operation of the system is normal. True, I lengthened the pin up to 1.9m, because in the staffing version, the return to the 40m did not suit me. By receiving without problems. But on 20m and above it works fine. I did not expect similar from the mobile phone. After lengthening the pin, the return to the 40m has improved noticeably, communication up to 1500km manage without problems.

Is it possible to lengthen the antenna to 4m. To capture the 80m range?
Up to 4 meters did not extended, lengthened to 2.5 m, but at this length, 28 MHz disappears and the resonance was blocked at 21 MHz. Why, I did not understand, the extension coil is visible to the end does not shine. Therefore, further elongation did not spend not to lose 14 MHz. Yes, and the severity, you are right. The drive of the engines is weak and teflon gears will not be able to raise 4 m pin. After all, then the ameter should be significant, and at 1.9m you can make a pin of 3mm stainless steel.

... at 1.9 m, it turned out to be optimistic, in my opinion:
1. The setting of 20 and 40m is obtained with the difference in the antenna of the antenna 22mm, i.e. The transition from 40m to 20m, occurs very quickly, which is convenient in the RDA expedition.
2. Clear resonance appears on 30m and 12m.
3. The bandwidth to 40m reaches 15 kHz, i.e. You can rebuild from interference without additional adjustment.
4. The heating temperature of the antenna is less (about 20 degrees) than in a regular version (50 degrees), which indicates the greater efficiency.

Tell us about working in stationary conditions and in the parking lot?
I also tried to install this antenna on the mast 4m with counterweights for each range. The effect is even more pronounced. On 20m with the 4th counterweight, the antenna works perfectly, almost at the level of full-size GP. Of course, the work was carried out mainly in the field, but in an hour to spend 130-150 connections did not imagine labor, with a capacity of 80-90W. It also works great on 17 and 15m. By 40m, it is necessary to more carefully approach the choice of space, choose an elevation, or place, not far from the water.
73! Victor, RV6ab

Information received from RZ6AHE / 4, about the operation of ATAS-120 antenna, at home:

The other day became the happy owner of the FT-857D and antenna Atas-120. The first inclusion brought some bewilderment - awesome noises, etc. Antenna's removal outside the apartment (9th floor) caused a sigh of relief! Almost immediately spent a few QSO telegraph and telephone. Liked! The antenna works well. Next - made several oppositions, for different ranges. After that, on 40m - began not only to "sound", but also "Rude." The counterweight placed on the balcony, and their ends cling to neighbor balconies. I tried to put an antenna on the roof and made 4 counterweights of 36.4 m each. There was a perimeter of the roof accordingly, i.e. Not evenly by sectors. The antenna was tuned to the 80m, without alteration. True, it was not decided to leave an antenna on the roof ...
Yours faithfully
Alexander (RZ6AHE / 4)

Ru0au (Vadim), conducted comprehensive tests of ATAS-120A antenna (this is an updated version of ATAS-120), and wrote an article about this with an attached photo app. Read on Ru0au.qrz.ru.

Antenna tuner
For the FT-857 transceiver, two external antenna tuners are produced, this is FC-30 and FC-40, consider more of their real capabilities and purpose.

FC-30. which is installed next to the transceiver. Range of coordination by resistance 14 - 170Ω. The FC-30 scheme is a simple M-shaped chain in which the coils and capacitors are switched using the relay. Connecting to the transceiver is made by two cables, the voltage is alone, and in another control signaling signals. The inclusion of FC-30 is made in paragraphs 20 and 85, the main transceiver menu. The main purpose of this tuner is the coordination of the transceiver with an asymmetric cable, resistance 40 - 100 and compensation for the reactive component, which ultimately has a beneficial effect on the heating of the mind. The tuner has a built-in memory that remembers the settings and allows you to quickly adjust when switching antennas.

Automatic matching device FC-40 with built-in memory. This allows it to memorize many settings and instantly return to them, which significantly reduces the antenna setting time. FC-40 is designed for installation on the street (Housing moistureproof), directly on the mast, tree, the wall of the house and so on. The transceiver goes two cables, one 50romic and one control. First of all, FC-40 is designed to work with an antenna "long wire", the length of which can begin from 5 meters, the truth with such a length will not work on the ranges of 160 and 80 meters. For overlapping all KV ranges, it is recommended to use the "Bund" with a length of at least 20 meters. Power on the FC-40 is served via cable, which is turned on in the transceiver Cat / Linear. Unlike the ICOM AH-4 tuner, the range of possible resistance is limited in FC-40, which is bad, since it does not allow any rope at any frequency, on the other hand, the same limitation does not allow to coordinate the antennas with low efficiency. Therefore, if the antenna managed to coordinate, then the efficiency of the transformation will not be worse than 60%.

Work in expeditions
When you are cut off from constant power supplies, it is important that the transceiver consumes the minimum possible current from the battery. From the studies conducted it became clear that minimum consumption, it turns out if:

short up the 3rd leg, in the power time, on the body ,.

use not built-in or external speaker, and headphones included in lateral sections, on the left, on the front panel (It is there, and not from behind).

fully disable backlight (in menu 44, put off).

reduce (to reasonable limits) Strengthening in paragraph 81 of the menu.

reduce the transmitter power from 20 to 10 or 5W.

And now, read the reviews of real radio amateurs based on the practical experience of using this transceiver, in various conditions:

According to UA6FM (Konstantin), who took 857D with him to the expedition to Mount Beshtau, from the battery 7A / h, he actively worked for 4 hours, with small breaks and could still work, but the weather spoiled and needed to go down. Kostantin still, there is valuable experience, long-term offline work with 857 + two accumulators 7A / h + solar battery, during an expedition to the cessian gorge.

The radio station works perfectly in the field from a small battery in the telegraph mode. There are no complaints. Even when the food fell and the power fell - the quality CW was magnificent.
Rz6hon.

... I constantly work for RDA from different areas, one time I used FT-897D, but it is too heavy (4kg), the big and control knobs are not convenient (for me). Therefore, now switched to FT-857D and it suits me quite. If you carry the equipment on yourself - the most it is .....

UA6HJQ has repeatedly worked for 857, during hiking and automotive mining expeditions. The radio station has proven itself well. In hiking expeditions, a battery 7A / h, which is enough for 3 - 4 hours of active work, in economy mode (transmitter power not more than 20W). When leaving the car, the battery 55A / h whom was enough for several days, with power 100W.

..... I liked how the radio station works in CW and in general, during the expedition to the RM-03-24 mountain area. The most positive impressions. RW6FO.

Interesting story Vadim Ru0au:
In the summer of 2006, I was in an Ivan RV0AGX for almost two weeks on the alloy according to R. Yana Krasnoyarsk Territory, took with him FT-857D, three 7a / h of battery, one 18a / h and the solar battery of about 0,5A / h. He worked every day from the parking lots of 14 and 3,5 MHz to ordinary half-wave dipoles, as well as directly from the rubber boat in motion at 14 MHz, mainly 20W with an inclied cost-effective mode, as an antenna using a quarter-and-wave pin from a fishing rod. The transceiver was also used for a local connection at 144 and 433 MHz with a piece of wire as an antenna as a whole, the device is more than satisfied. In the boat, there was sometimes incomprehensible trivial on reception, probably because of a huge humidity. The device well showed itself when working from fitted batteries in economy mode, on simple dipole-like and pin antennas. The batteries taken with them would still have enough such an alloy the apparatus, of course, a little "fragot" (it is clear that it is not p-1xx), but it has grown several drops and shocks, for such dimensions and the masses is simply great. Soon there will be a detailed report with photos at http://ru0au.qrz.ru

The radio station continues to work normally when the voltage drops on the battery to 11B. It is very good, because it allows you to work with the transceiver on the strong "sleigh" batteries. Some instances of the FT-857D work with a supply voltage up to 9B, while all the main characteristics of the transceiver are saved and it continues to take signals normally!

In economy mode, the fans do not work when PTT is pressed, however, if the transceiver is heated, they are turned on. Fans suck air through holes located at the top and bottom of the front panel. Make sure that the garbage does not get through these holes inside the board and did not stall fans.

With autonomous diet, it is very important to know which power in the antenna you can count. Here is the corresponding table, composed on the basis of practical measurements of the dependence of the power given by the transmitter to the antenna, from the supply voltage.

voltage	consumable current	power TX.
15V.	7.6A.	16W.
14V.	7.5A.	16W.
13V.	7.5A.	15W.
12V.	7.5A.	15W.
11V.	7.4A.	14W.
10V.	7.3A.	14W.
9V.	6.5A.	10W.
8V.	1.9A.	0.9W.

The last items in the table (highlighted in red), critical modes that are not implemented in all FT-857D. Power as you can see also, does not match the data specified in the passport 20W, but it is corrected. After adjustment, it varies within 23-19W. And the current increases to 8a.

When testing, the transceiver was switched to economical mode (the third conclusion is closed on the housing), Display backlight is turned off. The measurements were made in the telegraph mode at a frequency of 14060kHz, on load 50Ω.

Rechargeable nutrition
In expeditions experimentally, it was checked that a battery with a capacity of 7A / C is enough for about 3 to 4 hours of active work on the KV (work in SSB, on a common call)in economy (Third conclusion on the case). Battery 4.5A / h grabs 1 - 1.5 hours, active work. At VHF, the time of work will be approximately so. For experiments, lead acid batteries were used from backup power supplies charged with homemade charger . Pay attention to one important feature, the length of the feed cable between the battery and the FT-857 should not be as short as possible. The fact is that on the feeding cable large length, the stress drawdown increases and we lose the precious shares of the volt.

Work in winter, at minus temperatures
Thanks to small size (265x155x50mm) and a small weight (2kg), FT-857 is easily placed in a small backpack, so it can be taken in pedestrian expeditions. I constantly drag this transceiver with me, even in winter. Consider - if the transceiver housing cools up to -5c, it will not work normally. Power will fall, the signal will change, constant noise will appear both at the reception and on the transmission and so on, but the frequency stability remains good. These are not glitches, many other transceivers do not even stand even -1c. If you actively work for transmission, the housing is heated and does not give the internals to cool down, so you can work at -10С. Remember this when working with the transceiver in the cold.

Compatibility with LPD / PMR / CB radio stations
Transceiver 857 (after disclosure) can provide double-sided communications in FM mode, with non-limited LPD / PMR radio stations that are popular among tourists. LPD radio has 69 channels in 25 kHz and deviation to 5 kHz. PMR466, 8 channels with a pitch of 12.5kHz and the deviation of 2.5 kHz. Switching deviation in FT-857 is made by pressing the NAR button.

In the 27 MHz band (CB), you can use FM, SSB, AM modulation. Sometimes there is a lot of interference from distant radio stations and industrial interference, but outside the city, the transition to CB can be justified. The range of communication between the SV stations is 1 - 15 km, depending on the conditions and antennas. Most of the radio station CB shows no frequency, but the channel number, so it is useful to have a channel matching table and frequency. The CB frequency range lies in the redistribution of 26.965 - 27.405 MHz.

Questions - Answers
I write a lot and here I decided to publish questions and answers to them, which are most often asked. So you save your and my time.

Is it possible to increase the power of the transmitter?
Yes, about 110-130W per kV, up to 55W at 144 MHz and up to 25W to 433 MHz. In some copies, you can increase and more, but it will suffer from the reliability of the work of the mind. At the VHF, many copies can not give to the antenna, declared 50Ws at 145 and 20W to 430 MHz.

Why climb into the transceiver, has it been configured at the factory?
I am not a supporter to climb into a new transceiver and to pick it there, but check it out, if necessary, adjust it - it does not hurt. So you will be confident that the Transceiver works for 100% of its capabilities. Not yet seen any 857 and 897 who would not need in small donoyakes (as of 2007).

The transeser got under the rain and a lot of wet, what to do?
Do not turn on the transceiver! Wipe the housing with a dry cloth, without opening the case, put it on the battery or in a warm place, for 4-10 hours. After this time, it will work as before.

Who is better than FT-857 or FT-897?
They are approximately the same, 857 was released later. I chose 857 because of the sizes, I needed a small but powerful kV transceiver for hiking.

Who is the closest competitor ft-857d?
If you mean the quality of the reception, then you need to make a separation of 857 to alterations and after. Before rework, 857 corresponds to the devices like FT-897, IC-706, 703, 746, TS-50. After modifications (in my opinion)This is the level of IC-756, TS-570, FT-900. Of course, it is all very conditionally and not objectively.

What category does this transceiver refer to?
This is a universal model that can be used in wearable, near and inpatient. In my opinion, he is closer to the wearable and crazy. Although with full-size stationary antennas, 857 works well as well as shortened. If you share frequencies, then this transceiver is better "sharpened" for squares than for VHF.

. ... help deal with the purchase of a transceiver! ...
. ... comparison Yaesu FT-897, FT-857 and ICOM IC-746 ...
. Yaesu FT-857, FT-897 - detailed adjustment of transceivers, disclosure.

Conclusion
So, the FT-857 transceiver is a universal apparatus that needs mandatory adjustment and verification of parameters. It can be said that he is worth his money. The upgrades described above are not always needed and not all. The scheme equipment of the device is usual for Japanese transceivers and outstanding characteristics you will not get from it, but it will work reliably.

From the main deficiencies inherent in this model (and others too), I would noted the lack of band bandpass filters, however, nothing prevents them from adding them as a separate block or make the preselect. Too wide filter after the first mixer (this is a compromise for a universal transceiver)which worsens potential opportunities for square.

The new version of the FT-857D includes a range of 60 m (5 MHz), as well as a digital signal processing system (DSP)!