This required the stock USB hub IC to be replaced with a hot air rework station.Įverything is mounted inside the radio chassis itself, and the end result is a neat solution with no external wires, hubs or dongles that has essentially turned the FT-991A into an SDR. The RTL-SDR is internally connected to the FT-991A's USB hub which had to be upgraded from a 2-port hub to a 4-port hub as the 2-ports were already in use by the CAT and Audio features. Rodrigo's system consists of an IF tap amplifier+filter board that is connected to an internally mounted RTL-SDR. Thank you to Rodrigo Freire (PY2RAF) for submitting his project that has cleanly turned a standard Yaesu FT-991A ham radio into an RTL-SDR based software defined radio panadapter with no external wires, hubs or dongles. ExtIO with Decimation & Tuner Bandwidth ControlsĬleanly Embedding an RTL-SDR in an FT-991A With No Extra Cables.Manual gain controls and decimation driver.Measuring Traffic Volumes with Passive Radar.SignalsEverywhere Direction Finding Tutorial.Measuring Filter Characteristics & VSWR.Performing Replay Attacks with RTL-SDR and RpiTX.QRP (FT8, JT9, WSPR etc) Monitoring Station.Decoding 433 MHz ISM Band Weather Stations. GOES 16/17 and GK-2A Weather Satellite Tutorial.The FC-50 can be easily coupled with the FT-891. The FC-50 is a microprocessor-controlled antenna tuner that is designed specifically for the FT-891. The YAESU original DSP QRM and noise reduction functions are provide Automatic-Matching 100 Memory Antenna Tuner (Option) The CONTOUR, and the APF, are very effective receiver noise reduction tools in the HF bands operations. Also: the AUTO NOTCH (DNF) automatically eliminates the dominant beat tone. The 32 bit high speed floating Point DSP (max 3000 MIPS) provides effective cancellation/ reduction (DNR) of the random noise that is frequently frustrating in the HF frequencies. IF DSP provides effective and optimized QRM rejection TCXO provides ☐.5 ppm High frequency stability ( 10☌ to +50☌).3 kHz roofing filter equipped as standard.Triple conversion with a 1st IF frequency of 69.450 MHz (SSB/CW/AM).Yaesu Uncompromising Receiver Circuit Design Ensures Excellent Performance High reliability is assured by the transmitter careful circuit design with efficient thermostatically-controlled Dual internal fans and the diecast chassis. The FT-891 provides stable 100W (25W AM) high power output. Measuring 6.1" x 2.0" x 8.6" (155 x 52 x 218 mm), The FT-891 is an innovative Multi-band, Multi-mode Mobile/Portable transceiver with Ultra Compact and rugged case design.
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