The Yaesu FT-847 Earth Station: A masterpiece of high-tech design and packaging know-how!
Utilizing the latest computer-aided design techniques and thousand of "chip" components. Yaesu's engineers have achieved an engineering breakthrough that was only a dream just a few years ago: a full-power transceiver covering HF, 50 MHz, 144 MHz, and 430 MHz bands in a package about 2/3 the size of an average briefcase. Ready for action on SSB, CW, AM, FM, and digital modes, the FT-847's ultra-compact size makes it ideal for serious base stations use, and well as a variety of portable and mobile applications, including Field Day, DX-peditions, VHF/UHF "Rove" operation, and RV installations. And long-term reliability is ensured by the rugged construction, featuring an aluminum diecast chassis which doubles as the power amplifiers’ heat sink.
Unmatched for Satellite Operation
The FT-847 includes crossband full duplex operatin, so you can hear yourdownlink signal while transmitting (on a different band) on the uplink. The FT-847 is ready for operatin on Mode A (TX: 145 MHz, RX: 29 MHz), Mode B (TX: 435 MHz, RX: 145 MHz), Mode J (TX: 145 MHz, RX: 435 MHz), or Mode T (TX: 21 MHz, RX: 145 MHz).
Independent display of both the TX and RX frequencies is provided, and twelve dedicated Satellite VFOs allow you to set the transceiver up for operation on a number of different transponders.
Both "Normal" and "Inverted" tracking of the uplink and dosnlink VFOs is available.
Leading-Edge Receiver Design
Strong enough to survive the rigors of competitive HF operatin, yet sensitive enough for stand-alone Moonbounce operation without an external preamplifier, the receiver section of the FT-847 includes a low noise preamplifier, followed by a quad-FET first mixer, whch provides outstanding rejection of intermodulation.
On 430 MHz, the receiver preamplifier is a HEMT device, for extremely low noise. And if you have tower-mounted preamplifiers you wish to utilize, the FT-847 can be configured to bypass the internal preamp in favort of passing +12V through your coax line to power your preamplifier.
Built-in Digital Signal Processing (DSP)
For improved interference rejection, or enhancement of the signal-to-nise ratio, the FT-847 incvludes a sophisticated audio DSP system. Featuring Auto-Notch, Noise Reduction, and Bandpass Filter circuits, the DSP is an effective tool for improving receiver performance.
The Bandpass Filter is particularly effective in weak signal work, such as EME (Moonbounce), as the CW bandwidth may be reduced to a razor-sharp 25 Hz, with a variable center frequency. This can yield almost 10 dB of signal-to-noise improvement over many commonly-used audio filters.
Shuttle-Jog™ Quick Tuning Aid
First introduced on Yaesu's FT-1000MP transceiver, the Shuttle-Jog™ Tuning Ring provides rapid frequency change by its unique spring-loaded design. Rotating the Shuttle-Jog™ ring slightly to the left or right beginas manual scanning to lower or higher frequencies, respectively; lean the ring further, and the scanning rate increases!
High-Contrast Multi-Function Blue Liquid Crystal Display (LCD)
The large blue LCD provides high resolution and contrast for easy viewing from a wide range of angles and light levels. Dozens of status indicators keep you informed of every aspect of your FT-847's operating characteristics, with a large Sub-VFO field on the right side beig particularly helpful during satellite operation. The LCD's illumination brightness is adjustable via an 8-level dimmer function.
I found the Yaesu FT 847 on Ebay back in September 2010 and by the pictures it was in really poor shape. It had been taken apart by the last owner, (Now a SK) to be fixed (It must have been dropped?) but the job was never finished. The rig, and lots of other gear & transceivers was being sold by the SK's daughter and the Yaesu FT 847 was listed as a parts rig, so I took a chance and won the rig for the sum of $350.00. When the transceiver got here I had a puzzle of parts to start going through I was suprised to find there wasn't as much damage as it seemed to be in the pictures, and most all the parts were there. I ordered what I needed from Yaesu ($27.00 worth) and rebuilt what was broken and in October I tried it out and boy was I happy! I made several DX contacts on 10 meters, it was working fine on all the local repeaters, and I made my first contact to the International Space Station! I've got a little more work to do but all I can say is that Yaesu built these little rigs like tanks! I may be looking for a second one soon, thats if the XYL will let me! LOL!!
Bought my 847 when it first came out, and Im still happy with it.
The only flop I have found, is the power switch, but there are fixes online for it.
The other thing I don't like, is the noisy cooling fan.
But all in all, I have had a lot of fun with the rig.
Didn't get to use the sat features, since phase 3D did not work, and I have never got into the FM Birds....
I've had my radio since I bought it new in 2001, and cannot say anything 100% negative about it. I've used it for HF, weak signal, satellite, and some contesting, and it hasn't let me down. I've made only one modification to it which is for the power switch. I never had a problem with it, but since it is getting older, I didn't want the switch to fail on me. I have it on almost every day making contacts, and any problems I've had were operator error. The menu structure isn't complicated at all, and most of the common features are on the face of the radio for you.
I have not used nor own a big $$$ rig to compare it to, nor do I want one. I work almost any station I can hear, and the ones I can't work are due to my antenna (G5RV), and other stations running big power.
I've worked all over Eastern Europe, the Americas, and even Australia on the HF digital modes with the G5RV from my New England location. Computer controlling the rig for HF digital or satellite use is smooth and easy to set up.
The only note I do want to make about the rig (and it's not a complaint) is that it does NOT have VOX. I do have another rig with VOX, but I don't even use the feature. I can't justify spending another ~$500 on an upgrade to a rig with VOX - just press the PTT or build a voice recorder for it if that's what you need.
Over all, I don't plan on selling this rig anytime soon, and would purchase another one if I could! It's a great rig for what it does - if you have the chance, go ahead and get one. You won't be disappointed.
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