HobbyPCB on KickStarter with a QRP SDR transceiver


HobbyPCB on KickStarter with a QRP SDR transceiver

Here a few information found on KickStarters about the new product from HobbyPCB. Sounds really good from a smart group of people who really like to offer affordable product at a great quality level.

This low cost SDR transceiver sounds very interesting. I know Jim WA2EUJ. He is the RF engineer who also designed the award winning HardRock-50 power amplifier…. I own one… 🙂 Really cool with especially a FT-817, Elecraft KX2 or KX3.

Not just another SDR – The RS-HFIQ offers real RF performance for serious communications. Covering the 80-10M Amatuer Radio bands with excellent RX performance and 5 watts of TX power, using open-source SDR software for CW, SSB, AM, FM and digital modes, the RS-HFIQ sets a new standard for shortwave SDR communications.


Here all the specifications:

  • Frequency Range – 3-30 MHz (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 – <15 dB on 80M decreasing to <10 dB on 10M
  • TX Power 5W typical, 4W minimum
  • LO Feed-thru < -50 dBc @ 5W output
  • Spurious and Harmonics <-50 dBc typical <43 guaranteed
  • DC Power 13.8VDC, 2A max, plus USB power for the Arduino Nano

Filters, Filters, Filters

The RS-HFIQ uses a bank of carefully designed bandpass filters which divide the shortwave spectrum in to narrower bands prior to the active circuitry. The down-converter and baseband provide additional filtering so the signals passed to the digitizer contain only the information needed for processing.


Transmit Power

Many similar SDR hardware projects omit the transmit path entirely, providing only receive capability while others provide outputs in the 10 mW to 1W range. Even under the best conditions, communication at these lower power levels can be challenging and when conditions are poor 1W of TX power is frustrating. Even driving an external power amplifier generally requires more than 1W to achieve full output power. The RS-HFIQ includes the QRP standard, 5W output, MOSFET power amplifier running Class A to keep distortion to a minimum and the MOSFET is rated for 16 watts so there is plenty of margin for tolerance to SWR and high duty-cycle communications modes. Best of all, 5W is plenty of power to drive an external amplifier to the 50 or 100 watt power level; even to the legal limit of 1,500 watts for some serious communication power.

High Quality RF Design Doesn’t Need to be Expensive – HobbyPCB

With today’s inexpensive surface mount components and assembly techniques, top-notch RF engineering does not equate to expensive hardware. In truth, the RS-HFIQ is a fraction of the cost of similar performing transceivers and slightly more than lower power transceivers that cover only 1 or 2 bands. Not only is the RS-HFIQ the only 5W all-band shortwave transceiver commercially available for under $250, it offers the RF performance of transceivers costing many times more.

An Arduino in also part of this project, an Arduino NANO. Affordable equipment always starts with affordable components.


More information could be on KickStarters at this address : KickStarter Links

Meanwhile, do not forget to follow me on Twitter @VA2SS, subscribe to my blog and my YouTube channel as well.

Have fun and stay tuned!


Jeff | VA2SS