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'''The Yaesu FT-847 Earth Station'''The Yaesu FT-847 offers three radios in one -- HF, VHF/UHF and satellite. You get 100 watt output on HF and 6 Meters, plus 50 watts on both 2 Meters and 430 MHz bands. Additional features include: Cross-band Full Duplex operation, Normal/Reverse Tracking, CTCSS/DCS Encode and Decode, 0.1 Hz tuning steps, DSP Notch, DSP NR and DSP BPF, Shuttle Jog Tuning Dial, Carry Handle and Keypad Entry. The FT-847 is also 1200/9600 bps Packet ready. [[File:yaesuft847px01.jpg]]Product dimensions: 10.2 x 3.4 x 10.6 inches. With MH-31B8 hand mic. Firstly the RX frequency coverage is:* 100Khz to 76Mhz ( no gaps ) even though the instruction manual and advertising brochure has a gap between 30Mhz and 37Mhz.* 108Mhz to 174Mhz* 410Mhz to 512MhzThe Selectivity of the FT847 is* SSB/CW 2.2Khz* AM 9Khz* AM/N 2.2Khz* FM 15Khz* FM/N 9Khz==review==Mike Foubister ZL3TIC has a pretty good review.See: [http://www.uksmg.org/content/ft847.htm Review of the Yaesu FT-847]Other comments:The Yaesu FT-847 and Kenwood TS-2000 are very similar in features.There is no built-in SWR meter, just a "High SWR" indicator.===memory channels===*'''78 general purpose memory channels'''*20 "Smart Search" memory channels (FM only)*10 full duplex satellite memory channels*4 home memory channels*1 quick memory bank channel*24 band stacking registers===program memory channel===#select frequency and PL tone for channel#Press MCK/W#select available channel with MEM/VFO CH knob#Long Press MCK/W===program memory channel======cross band repeater (one-way only)===#select frequency and PL tone for channel#press SAT to activate Satellite mode#set xmit freq to sub display#set rec freq to main display#press MENU and select item #41 X RPT set to ON#press MENU ===vfo frequency range scan===You can also do a "programmed" scan. Set Memory Channel L to the lower limit you want to scan and Memory Channel H to the upper limit. Press the PMS button and "LU" will show in the memory channel number position. If you press Scan now, the rig will scan between those limits. Note that the firmware in the rig will round off your L and H values to the next lower 100 kHz. This means that the smallest increment you can scan is 100 kHz.#press ENT and enter the lower frequency limit followed by ENT#select available channel with MEM/VFO CH knob#Turn the MEM/VFO CH dial until "L" is displayed for channel#press ENT and enter the upper frequency limit followed by ENT#Press MCK/W#Turn the MEM/VFO CH dial until "U" is displayed for channel#Long Press MCK/W#Press the PMS button and "LU" will be displayed for channel#Press SCANTo exit the scan press SCAN again, and press PMSNote that you will now have channels L U in the normal channel sequence. You can delete them or set them to skip. However, if you set them to skip you cannot put the rig into Programmed Scan mode by pressing the PMS key.===full menu options list===1Display Dimmer Level2VFO Dial Step Size3VFO/Mem Ch Step Size (SSB/CW)4VFO/Mem Ch Step Size (AM)5VFO/Mem Ch Step Size (FM)6CW Sidetone/BFO Pitch7CW Keyer Weight (Dash:Dot ratio)8CW Sidetone Level9CW Delay Time (Rx Recovery Time)10DSP CW Filter Bandwidth11DSP Noise Reduction Level12CTCSS Tone Frequency13DCS Code #14Auto Rptr Shift (144 MHz)15Auto Rptr Shift (430 MHz)16Rptr Shift Magnitude (29 MHz)17Rptr Shift Magnitude (50 MHz)18Rptr Shift Magnitude (144 MHz)19Rptr Shift Magnitude (430 MHz)20SSB Monitor Audio Level21"Beep" Tone Pitch22"Beep" Tone Audio Level23FM Packet Baud Rate24Tx Mode Multimeter Readout25FM Mode Mic Gain26Scan-Resume Pause Time27[Lock] Switch Mode2850 MHz Antenna Port Selection29Rx Preamp Selection (144 MHz)30RX Preamp Selection (430 MHz)31[Tuner] Switch Control Function32Mic. Up/Dwn Sw. Control Function33CW Filter Activation34Satellite Mode TX Meter Function35Satellite Memory Alpha Labels36Satellite Auto-Memory Function37Data-Transfer Baud Rate38Clear All Memories39Microprocessor Full Reset40useless function41One-Way Cross-Band Repeater Mode42Menu Expansion (To #90 ~ 96)90TX DCS Code Inversion91RX DCS Code Inversion92TX Carrier Injection Point (USB)93Rx Carrier Injection Point (LSB)94Cloning Data Transfer Baud Rate95Clone Mode "SEND"96Clone Mode "RECEIVE"==model variations==quote "''Generally, prior to the 8G05 production run, there was one main problem in the design of the radio: it only had unidirectional CAT control for frequency and mode (i.e., you could only use the PC to command the rig but not to report the rig frequency and mode back to the software on the PC). Beginning with production run 8G05, the radios have bidirectional CAT for frequency and mode (PC commanding the rig, and the rig reporting information to the PC). In the USA (at least), Yaesu offered to upgrade all radios older than 8G05xxxx under warranty, which involved replacing a computer chip in the radio and some other modifications. Many people with earlier rigs took Yaesu up on their offer.''" , [http://www.supercontrol.de/cat/ft847faq/page5.htm#memories source].Serial Number Format: Year of manufacture-Month of manufacture-Production Run-Individual Unit number, where the month of manufacture is offset by 2, so "C" means January, "D" means February, "E" means March, and so forth.Example: 8G051234 = 1998, May (fifth month, or "G"), Production Run 05, unit #1234 in this run.Example: 8G060144 = 1998, May, Production Run 06, unit #144==technical=====microphone pinout===[[Image:yaesuft847px02.png]]===modification===[http://www.uksmg.org/content/ft847.htm The Frequency coverage] of the 847 TX once modified is:1.8Mhz to 76Mhz ( no gaps ) DO NOT TRANSMIT IN THE RANGE 32MHZ TO 37MHZ AS YOU ARE TRANSMITTING INTO A LOW PASS FILTER AND COULD DO DAMAGE TO THE POWER AMPLIFIER.137Mhz to 174 Mhz and 410Mhz to 470MhzThe modifications are quiet simple:Remove bottom cover you will see the backup battery, on the left hand side their are 6 solder pads numbered 1 to 6 pad one already has a 0 ohm chip resistor across it, short pads 2 and 3 with 0 ohm chip resistors or just use solder ( not as neat ).Check pad 6 if it has a chip resistor on it remove it ( if it is not removed the radio will not go out of band on HF and 6M )Replace cover , reconnect radio press the fast and lock buttons together at the same time and turn the radio on this will reset the micro ( you will loose all your memories ).Testing this mod on a dummy load and watt meter found 1.8Mhz to 30Mhz getting a good 100W right though, from 37Mhz to 50Mhz was also very close to a 100W!!From 54Mhz to 76Mhz the power did drop off the higher the frequency at 70Mhz getting approx 20W.137Mhz to 174Mhz was pretty good with output of 50W!! found the same on 410Mhz to 470Mhz !!MODIFIED SOLDER PAD CONFIGURATION:# IN PLACE - a resistor should already be present here# IN PLACE - a resistor should already be present here# SOLDER BRIDGE - solder a bridge across the pad if a resistor is not present# OPEN - remove resistor if present or leave open# IN PLACE - a resistor should already be present here# OPEN - remove resistor if present or leave openSee: http://www.g1ivg.com/ft847.htm - he has a pictureSee also: http://www.radiomods.co.nz/yaesu/yaesuft847.html===hidden menus===There are special menus on the FT-847. One, documented in the Operating Manual, is accessed by changing Menu #42 EXTEND to ON. Alignment menu - not mentioned in the manual. To access this menu, you need the standard mike with the UP, DOWN, and FAST buttons. Hold down these three buttons simultaneously and turn on the radio using the power switch. This will place you into the alignment menu. Doing this does not cause a reset of your radio.==references and resources==*[http://www.supercontrol.de/cat/ft847faq/ft847faq.htm FAQ for the Yaesu FT-847 transceiver][[Category:Electronics]][[Category:Radio]][[Category:Ham Radio]][[Category:2-Way Radio]][[Category:Tangible Product]]