Here we take a look at the RS-HFIQ 5 Watt HF SDR Transceiver by HobbyPCB.
The RS-HFIQ is an open-source HF transceiver project designed to translate I and Q baseband signals to RF in the 80/60/40/30/20/17/15/12/10M Amateur Radio bands. The I and Q signals must be provided/processed by external signal processing which could be a PC running Software Defined Radio software or a stand-alone digital signal processor
The receiver in the RS-HFIQ consists of 5 band-pass filters to reject out-of-band signals, an LNA with frequency dependent gain and a conventional quadrature down-converter.
The transmitter in the RS-HFIQ uses a Quatrature up-converter followed by the same band-pass filters used by the receivers, a 5W power chain and a low-pass filter bank.
The Local Oscillator is based on a Silicon Labs SI5351 chip that can product up to 3 RF outputs, the LO signal for the up/down-converter, a built-in test signal for calibrating I and Q offsets and an external signal.
The control of the SI5351 and all switching functions is provided by an Arduino Nano running open-source software and programmed with the Arduino IDE.
Special care has been taken to insure noise and ground-loop set-up. The RS-HFIQ has three separate DC isolated ground planes; RF/Chassis ground, Baseband/Audio ground and Digital ground. This allows the same PC to be connected to the audio in/out and the USB port on the Arduino Nano without creating noise/grounding issues.
5W not enough power? Add a HARDROCK-50 to your station to boost up to 50W. The RS-HFIQ and HARDROCK-50 seamlessly integrate together for a powerful base station!
- Frequency Range – 3-30MHz (performance guaranteed on 80/60/40/30/20/17/15/12/10M ham bands)
- Sensitivity – MDS < -128 dBm on 80M dropping to < -135 on 10M (depending on processing bandwidth and sound card performance)
- Noise Figure –
- TX Power 5W typical, 4W minimum
- LO Feed-thru < -50 dBc @ 5W output
- Spurious and Harmonics < -50 dBc typical
- DC Power 13.8VDC, 2 amp max plus USB power for the Arduino Nano
- Size – 100MM x 160MM
The RS-HFIQ is NOT a stand-alone transceiver, it is a part of a Software Defined Radio system. The SDR system consists of:
- Radio front-end – The RS-HFIQ
- Data conversion – Analog to Digital and Digital to Analog typically provided by a high-quality sound card
- Computer hardware – A digital signal processor or high speed general purpose processor.
- SDR Software – to process TX and RX signals
While many different configurations are possible and even encouraged, we have developed a ‘standard’ configuration that will help users new to SDR’s go up and running quickly. To get on the air with the RS-HFIQ in the standard configuration you will need:
- StarTech – 96 KSPS sound card
- Windows PC – running Windows 7, 8 or 10 with speakers and two available USB ports
- 13.8V 3A power supply
- Various USB and audio cables
- HDSDR and Omni-Rig software
- A valid Amateur Radio license is required for transmitting
- Antenna system
Visit the RS-HFIQ Transceiver Wiki for more information.
ELAD FDM-DUO SDR QRP Quick Tour and Review
FDM-DUO is a SDR tranceiver that offers the possibility to operate STand-alone like traditional radio or attached to a Personal Computer discovering t… Read more
YAESU FT-DX10 Update and SDR Chat
Here are some great photos of the new FT-DX10 plus a chat about SDR. ESTIMATED DECEMBER 2020 The New Yaesu Ftdx10 UK VERSION COVERS 4m ! T… Read more
Working QRP – LDG Z817 Tuner Review
A hands on look at the LDG Z817 Autotuner with a QRP contact at Foymount Ontario. <span style=”color: #000000; font-size: 14pt;”>T… Read more
Why You Should (and shouldn’t) Upgrade Your Amateur Radio License – Ham Radio Q&A
“Congratulations! You just earned your FCC Technician amateur radio license. I bet when you took the test, one of the examiners asked if you wis… Read more
SX-2000 QRP HF transceiver with touch screen
SX-2000 QRP HF transceiver “”I had in mind for a long time to realize an HF transceiver complete with all the functions of a commercial ap… Read more
sBITX – An open source SDR that you can hack
Here how to convert your existing homebrew radio into a full-fledged SDR for less than$100. The idea of hybrid architecture was first implemented in t… Read more
New Dual Inline Module – GAP Antenna
The new GAP Dual In-Line DSP noise eliminating module provides two channel/stereo noise cancellation, and is suitable for use on all radios and receiv… Read more
The brand new SunSDR2 PRO transceiver is a modern SDR transceiver developed with contesting and DXing in mind. It covers all HF bands plus 50 M… Read more
HAMlab 160-6 100W – SDR Transceiver
HAMlab 160-6 100W – SDR Transceiver Highlights SDR + measurement instruments rugged steel housing LDMOSFET 10W Linear amplifier (160M-6M) 1Gsps… Read more
KT31WARC, 18.068-18.168 / 24.890-24.990 MHZ
The updated KT31WARC offers flexibility in size and frequencies. It is truly unique in many ways. The KT31WARC covers 12,17 and 20 or 30 meters. 20 or… Read more
Cushcraft A4S Yagi Beam Triband 4 ele. 10,15,20M
Cushcraft A4S A4S Four Element Beam – 10, 15 & 20 Meters A4S is the true, high performance tribander. Precisely tuned high-power traps, c… Read more
The Cycle Buster – New HF Dual Antenna M2 !
The 40-20M-3-5 is a coil loaded 40 meter 3 element Yagi interlaced with a 20M 5 element Yagi. This antenna is the perfect package to bust the sun spot… Read more
Triband end-fed half wave antenna for portable use
Describing and demonstrating an end-fed multiband antenna for portable use. It’s a full-sized half wave on 20 metres and a loaded half wave on 4… Read more
DX Engineering Skylark Dual-Band Yagi Antenna DXE-2X7
Antenna, Beam, Skylark, Duoband Yagi, 17 and 12 meters, 90 mph Wind Rating, 16 ft. Boom Length, Each HF Beam Antenna Type:Yagi HF Beam Antenn… Read more
App – Mobile
RFinder – The World Wide Repeater Directory now free trial on Android!
In order to support the proliferation of third party app stores worldwide, we have now released RFinder on Android as trialware! Just go download it f… Read more
Hamradio Line Loss Calculator for iOS devices
Coax Line from Federico Romano, IW2MVI is a simple and fast app that allow you to calculate the loss of your coax line and calculate power output from… Read more
Wizkers:Radio is a controller for various Amateur Radio equipments. At the moment, it supports several Elecraft radios and amplifiers, as well as the… Read more
Koch Morse Trainer Pro – Android App
Take your morse code to the next level with Koch Morse Trainer Pro. The only trainer that supports prosigns (procedural signals) and non-english cha… Read more
Satellite Explorer Pro – IOS App
‘Satellite Explorer Pro’ is a tool for tracking satellites in real time. It is not a game. Be sure to visit the support web site http://ww… Read more
The post RS-HFIQ 5 Watt HF SDR Transceiver by HobbyPCB appeared first on QRZ NOW – Ham Radio News.