Yaesu ft 857 output power
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 housing can serve as a sample of an ergonomic solution, with the convenient accommodation for frequently used switches and handles for quick access to them.
High quality desktop design
Based on recognition high Quality FT-1000D models, Mark-V FT-1000MP and FT-897, Yaesu engineers created input stages of the FT-857 model with very low level 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 a competent selection of components and amplification distribution, allowed to implement receiving systemReady 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 Source Connection direct current
- Fleece fuses
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 P-399A: No photos, overall impressionSuch 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 in different time and in different places. So, look: Gallery 1, Gallery 2, EW6BN Gallery.
ATAS series antennas
For lovers mobile communications 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. ATAS-120 has a motor installed for automatic setting, food on it and management is fed by 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! Practical description Installation and operating antenna, you can see 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? Is it possible to lengthen the antenna to 4m. To capture an 80m range? ... at 1.9 m, it turned out to be optimistic, in my opinion: Tell us about working in stationary conditions and in the parking lot? 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 ... 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 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 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 autonomous work With 857 + two accumulators 7A / h + solar battery, during the 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. ... 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: 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.
... 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.
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.
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.
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
Yours faithfully
Alexander (RZ6AHE / 4)
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.
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:
Rz6hon.
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.ruvoltage 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 using a self-made 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 strongly a 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 engineering of the device is ordinary 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.
Dimensions: 155 x 52 x 233 mm
Weight: 2100 gr
Delivery to all regions of Russia !!!
KV-transceiver yaesu ft-857
General characteristics Kv-tranny yaesu ft-857
Large multifunctional LCD display with the ability to select a backlight color
Ability to work on separated frequencies (SPLIT)
DSP processor
IPO system (Intercept Point Optimization)
Attenuator
200 memory channels with alphanumeric numbering
2 Antenna Connector: Separate connectors for connecting antennas on HF / 50 MHz and 144/430 MHz
Various scan modes:
VFO SCAN - Scan range in search of a signal
Memory Scan - scanning all memory cells or selected group
PMS - Scanning in the specified frequency range
Dual Watch - automatic check Signal at the second VFO frequency
CAT system for transceiver control from computer
Continuous transmission duration limit timer (TOT)
Automatic shutdown Apparatus after the specified inactivity period (APO)
Battery charge level indicator
Frequency range: TX: Amateur ranges 160-6 m, 2 m, 70 cm RX: 0.1 - 56 MHz, 76 - 108 MHz, 118 - 164 MHz, 420 - 470 MHz
Number of channels: 200 main channels in 10 memory banks 4 domestic channels 5 programmable search ranges 1 selected channel
Output power: kV and 50 MHz: from 5 to 100 W (am carrier - 25 W); 144 MHz: from 5 to 50 W (am carrier - 12.5 W); 430 MHz: from 2 to 20 W (am carrier - 5 W)
Dimensions: 155 x 52 x 233 mm
Weight: 2100 g
Equipment:
- Transceiver (receiving transmitter)
- Communicator (Tangent)
- Power cable
- User's Manual
Guarantee: 24 months
| Main technical characteristics | |
| Frequency range | TX: Amateur ranges 160-6 m, 2 m, 70 cm Rx: 0.1 - 56 MHz, 76 - 108 MHz, 118 - 164 MHz, 420 - 470 MHz |
| Number of channels | 200 main channels in 10 memory banks 4 domestic channels 5 programmable search ranges 1 selected channel |
| Power supply | external, 13.8 V ± 15% (DC) |
| Types of radiation | A1 (CW), A3J (LSB / USB), A3 (AM), F1 (package 9600 bits / s), F2 (pack 1200 bits / s) F3 (FM) |
| Operating temperature range | from -20 ° C to + 60 ° С |
| Gabarites, mm. | 155 x 52 x 233 mm |
| Weight, G. | 2100 |
| Receiver | |
| Sensitivity at 10 dB SINAD for SSB / CW / AM and 12 dB for FM, μV | 0.1-1.8 MHz, AM 32 MKV; 1.8-28 MHz, SSB / CW 0.2 μV; 1.8-28 MHz, AM 2 MKV; 28-30 MHz, SSB / CW 0.2 μV; 28-30 MHz, AM 2 MKV; 28-30 MHz, FM 0.5 μV; 50-54 MHz, SSB / CW 0.125 μV; 50-54 MHz, AM 1 μV; 50-54 MHz, FM 0.2 μV; 144/430 MHz, SSB / CW 0.125 |
| Selectivity on the neighboring channel, dB | SSB / CW: 2.2 / 4.5 kHz (-6 / -60 dB); AM: 6/20 kHz (-6 / -60 dB); FM: 15/30 kHz (-6 / -60 dB); FM: 9/25 kHz (-6 / -60 dB); SSB (with additional filter YF-122S): 2.3 / 4.7 kHz -66 dB; CW-N (with additional filter YF-122C) 0.5 / 2.0CHz |
| Mirror selectivity | KV and 50 MHz: 70 dB; 144 and 430 MHz: 60 dB |
| Suppression by IF, dB | 60 dB. |
| LF-Output (audio output) | 2.5 W (at 4 ohms, 10% of books or less) |
| Transmitter | |
| output power | KV and 50 MHz: from 5 to 100 W (am carrier - 25 W); 144 MHz: from 5 to 50 W (am carrier - 12.5 W); 430 MHz: from 2 to 20 W (am carrier - 5 W) |
| Modulation type | SSB: Balance Modulation AM: Low-level modulation in early Cascades FM: Variable reactivity |
| Maximum Deviation (FM) | ± 5 kHz (NFM: ± 2.5 kHz) |
| Outcompute radiation | -50 dB (1.8 - 29.7 MHz); -60 dB (50/144/430 MHz) |
| Suppression of the carrier (SSB) | not less than 40 dB |
| Suppression of the second side | at least 50 dB |
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
The Yaesu FT-857 transceiver is an impression of an improved FT-817, possessing the same overlap capabilities in frequency, operation modes and similar access through the menu. However, the FT-857 provides an output power from 5 to 100 W, an output power at amateur frequencies from 1.8 to 29.7 MHz and in a 6-meter range, as well as a capacity of up to 50 W on the range of 2 m and 20 W - by 70 cm (Maximum power FT-817 is just 5 W).
The mass of FT-857 does not exceed 2.1 kg. It is mounted in an elegant compact case with dimensions of 51x155x234 mm. The most promising to apply this transceiver as a mobile or base radio stationbecause In combination with the additional weight of the battery, the antenna and accessories it is quite heavy for hiking.
The first thing to be done after retrieving the new FT-857 from the box is in accordance with the instructions given in the instruction manual, attach the front panel to the main transceiver unit. The removable front panel is currently almost a standard element for small mobile transceivers. If you need to install the control panel at some distance from the main unit, the radio amateur will have to purchase the optional set of YSK-857. Generally speaking, the ability to install the main "box" of the radio station under the seat or in the car trunk, consolidating on the dashboard only a small control panel allows not only to save the volume of the cabin, but also to easily hide the transceiver from prying views.
For the FT-857 transceiver, Yaesu offers three optional filters - YF-122S with a bandwidth of 2.3 kHz for operation SSB, telegraph 500-hezch YF-122C and telegraph 300-heza YF-122CN. In the transceiver, any two of these filters can be installed. The filter selection is done through the menu.
A very successful compiled 128-page instruction manual FT-857 is filled with a mass. useful information About this complex apparatus configurable using a plurality of the menu in accordance with individual operator requests. It is advisable to distinguish the time to carefully study the instructions to fully master all the features of FT-857.
Yes, the acquisition of the management skills of this transceiver will require certain efforts, especially if the radio amateur has not previously exploited transferences using "layered" menu management, most functions are carried out using 14 buttons.
Function button F provides access to a "multi-layer" menu. A short press on this button calls an indication on the LCD 17 Menu, which is controlled by three MF buttons, located under the display in the menu you can set the parameters of the most frequently used functions. In addition, many items of these menus serve simply to turn on and off certain functions. For example, you can select a filter (CW or SSB), VFO (A or B); Go to work "Split"; make a frequency in the memory cell; Play the contents of the CW key memory; Turn on / off speech processor, attenuator, noise and coder and coder or CTCSS tones decoder. Displaying a number of options (image size on the display, Panoramic mode, output power, CWW, signal strength) is also selected by multifunction buttons.
Pressing and holding the F button allows you to enter the menu system to set a wide range of FT-857 performance, configuring their subqueries of the operator 91 The menu item provides the ability to select the output power of the transmitter, CW-key settings, parameters in CW or SSB modes, color and brightness of the display , enhancing the microphone path, the repeater shift, the height of the telegraph tone and much of the other.
FT-857 is saturated with memory cells. The fast memory bank (QMB) is used to promptly enter the frequencies that may urgently need to operate stored in QMB information at any time can be transferred to any of the 200 standard slots. In addition, frequencies and modes of operation listed in QMB can be changed by the operator.
The main memory bank consists of 200 slots that can be used to store the most preferred customization frequency operator with operation modes and CTCSS information. To facilitate identification, any of the passing frequencies can be equipped with an alphanumeric "label".
In FT-857, the smart search function for mobile transceivers has already been provided. In this mode, the transceiver is searching for active frequencies above the current tuning frequency, fixing information about them in 50 smart search memory cells. Memory is "soft" (Soft), because All its contents is lost when the smart search is turned on or when you go to VFO mode. Smart search is very convenient to detect repeater while traveling.
The FT-857 also implements the function of the panoramic indicator, which allows the "see" operator the activity above and below the luggage rate (it is similar to the spectrum analyzer) both in VFO mode and when working on the frequency recorded. When the indicator is on, the LCD displays the relative power of the signals at frequencies directly adjacent to the adjustment frequency, and the scale of the frequency sweep can vary. This feature is magnificent for tracking the situation on the air during the contests and to assess the degree of activity in the range.
Scanning in FT-857 can be implemented in several ways. In the VFO mode, the transceiver scans the frequencies above or below the setting frequency (by selecting the operator) in the speed of the setting frequency from the memory. Scanning goes through the channels whose frequencies are stored in memory. You can program the skip of certain channels. In the programmable memory scan mode, the scan is carried out in the user-defined borders. And finally, the FT-857 is implemented a priority channel scanning mode, in which the activity at the frequency is periodically checked, the value of which is entered into the M-001 memory cell, regardless of whether the VFO mode is used, or work is carried out on a specific channel. After detecting the signal in the priority channel, the transceiver will immediately go to its frequency.
Used yaesu CAT system provides control of various FT-857 functions using personal computerBut for this you need to purchase an option cable ST-62, which connects the computer Som port with the CAT / LINEAR connector installed on the FT-857 rear panel, and convert signals.
Attentive study of the characteristics and careful analysis of the test results of the device in the Arrl laboratory - all this, of course, is good, but not enough to make a decision on the purchase of a transceiver. You can purchase a transceiver with outstanding parameters and do not have the slightest pleasure from working with it apparently, many radio amateurs will have to see the ability to change the color of the LCD display in the FT-857 when changing the range, frequency portion or operation mode. This means that you can choose different colors for FM, AM, DATA modes, or spend the color encoding of segments in the ranges, highlighting, for example, frequencies for the operation of QRP, DX-sections, simplex communication frequencies or repeater subbands.
However, the experimental operation of the FT-857 in CW mode revealed that there is no QSK in the transceiver. Reception / transmission switching time can be adjusted from 30 to 3000 ms, which, of course, does not allow to listen to the ether in pauses between CW-parcels In addition, the switching reception / transmission is carried out by an electromechanical relay, which at high speeds creates significant acoustic noise.
The TX / Busy indicator, located on the left of the setting knob, is very convenient and useful. This indicator is glowing in green when the noisecode is red - in transmission mode, and blue - when the frequency of the received signal accurately coincides with the central frequency of the transmission path of the PC in CW mode, such an implementation The indications greatly simplifies the exact setting on the corresponding frequency, especially for operators that do not have absolute hearing, in addition, when working in FM mode, the light of the indicator will be blue, when one of the frequencies of the received coded signal CTCSS / DCS coincides with the frequency of the transceiver setting.
It is very useful and the ability to download up to three "canned" messages for their instantaneous playback by singing one of the three multifunction buttons (PLU1, PLY2, PLY3 in the MFO multifunction menu). Thus, you can configure the CW key to work in the contests (without the formation of sequence numbers). FT-857 receiver settings are somewhat worse than the receiver Yaesu FT-897, FT-857 somewhat loses its older brother by dynamic range (on blocking and intermodulating third-of-order), but characterized by a little best provisions Points of intersection IP3 and IP2.
As you know, the ideal apparatus does not exist, and FT-857 is no exception. So, for the user it would be nice if the transceiver had a separate reference set of laminated plastic cards with a list of 91 menu systems and 17 multifunctional options and explanations to them, which would save from the need to constantly access the thick instruction manual. A power cord is very unsuccessful, which consists of separate red and black wires with a pairing plug with the transceiver at one end and fuse holders on the other. Such a cord is almost impossible to lay in a car without cutting or plug, or fuse holders.
FT-857 is a good choice for radio amateurs preferring mobile work On the air 100-watt transceiver with good parameters enclosed in a very small body, is a decent successor to a very successful FT-817.