![]() ![]() The parts were glued on the boards and the boards were ran through the wave soldering machine much like through hole boards were soldered. There was a screening process but this was for a high temperature epoxy that was in the center of the components. And FWIW, this was the first surface mount job this place did and it was done much more like through hole construction. I was more making the point that the old cell phones used good RF design and kept the micro’s noise out of the RF. Posted in Parts, Radio Hacks Tagged Arduino libraries, radio, receiver, Si4735, Si47xx Post navigation We actually first heard about this library a few days ago when we covered another receiver using the Si4735 and popped into the comments to share some of the work he’d been doing to push the state-of-the-art forward for this promising chip. Even if you aren’t terribly interested in adding shortwave radio reception to your next project, you’ve got to browse his documentation just to see where the high water mark is. Seriously, if all open source projects were documented even half as well as this one is, we’d all be a few notches closer to world peace. The documentation has put together for his MIT licensed Arduino Si4735 library is nothing short of phenomenal. He’s currently tested it with several members of the official (and not so official) Arduino family, as well as the ESP32. You see, is the person who’s actually developed the library that allows you to control the Si4735 from your microcontroller of choice over I2C. Of course, the presentation of this receiver isn’t really the point it’s more of a proof of concept. The next evolution would be to put this whole rig into some kind of enclosure, but for now he seems content to control the action with a handful of unlabeled buttons on a piece of perfboard. We especially like the horizontal bars indicating the signal to noise ratio and received signal strength. Using an Arduino Pro Mini, a handful of buttons, and a standard TFT display, has put together a serviceable little receiver with a fairly impressive user interface. All you’ve got to do is provide it with a suitable control interface, which has done with his recent project. With a bit of hacking, it even supports single sideband (SSB). MFJ-462B measures 6.25Wx2.5H圆.25D inches.The Silicon Labs Si4735 is a single-chip solution for receiving AM, FM, and shortwave radio. Use 12 VDC or use 110 VAC with MFJ-1312D AC adapter, $14.95. MFJs AutoTrak automatic Morse Code speed tracking helps MFJ-462B to track and decode high speed CW. One line comes in at speed of signal, second line is delayed so you catch every exciting word!Ĭopy most standard shifts and speed in all modes. The 2 line 16 character LCD display has contrast adjustment. A precision tuning indicator makes tuning your receiver for best copy on all modes quick and easy. Just push a button to select modes and features from a menu. Mark and space tones are copied to give you greatly improved decoding under adverse conditions. Digs out weak signals buried in noise and even tracks slightly drifting signals. Save several pages of text in 8 K of memory for later review or re-reading.Ĭonsistently get solid copy from MFJs high performance PLL (phaselock loop) modem technology. Plug your Epson compatible printer into the MFJ-462B printer port and youre ready to print. Printer monitors 24 hours a day by printing transmissions. traffic you cant read unless you have a decoder. Theres plenty of exciting non-voice traffic on shortwave thatll keep you fascinated. ![]() Monitor Morse code communications from hams, military, commercial, aeronautical, diplomatic and maritime coastal stations from all over the world. Listen to maritime users, diplomats and amateurs send and receive error free messages using various forms of TOR (Telex-Over-Radio). Catch diplomatic, research, commercial and maritime traffic. Listen to military traffic passing from Panama, Cyprus, Peru, etc. Copy RTTY weather stations from Antarctica, Mali, Congo and many others. ![]() No computer, interface, special cables or other equipment is needed.Įavesdrop on the latest breaking news as press agencies from all over the world relay them on RTTY - its like having a private wire service in your home. Then watch these mysterious signals turn into exciting text messages as they scroll across an easy to read LCD display. Plug this self-contained MFJ MultiReader into your shortwave receivers earphone jack. Much of it is RTTY, ASCII, CW, and AMTOR (FEC) signals passing commercial, military, diplomatic, weather, aeronautical, maritime, amateur and other traffic. Ever wonder what those mysterious chirps, whistles, and buzzing sounds are on the shortwave bands? ![]()
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