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Software Radio Laboratory LLC Wiki

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[last updated August 7, 2015]

QS1R Current Pricing:

QS1R Receiver Board with aluminum enclosure - $899.99

Some of the QS1R Unique Features:

- QS1R RevD 10kHz to 62.5 MHz receiver with up to 2 MHz bandwidth
- DAC Audio output for minimum latency
- External Hardware Mute Input
- Windows/OSX/Linux software
- Skim up to 7 Ham bands at once with CW Skimmer Server!
- Create your own DX Cluster on 7 Ham Bands at once with CW Skimmer Server.


<http://www.srl-llc.com> or from the QS1R Wiki HERE


SDRMAX V is the latest cross platform (Windows, Linux, OS X) software for the QS1R


NDB Decoding:


SDRMAX V runs on Windows XP, Vista, and Windows 7, OS X, and Linux, 32 bit and 64 bit versions.

SDRMAX V Information Here

SDRMAX V Download Here

SDRMAX V Screenshots on the QS1R Yahoo Group in the files section


Please watch our QS1R Installation and Setup YouTube Videos


  • Email p <dot> covington <at> gmail.com



Winrad ExtIO DLL for the QS1R can be found here: <http://www.srl-llc.com/qs1r_latest>

  • Supports sampling rates up to 2.5 MSPS for a bandwidth of 2 MHz (including recording and playback).


The latest revision of QS1R is RevD.

QS1R Receiver Specifications

Frequently Asked Questions (FAQ)

QS1R Online Manual

Problems Installing the Software or Driver

Software Radio Laboratory LLC (SRL-LLC) Warranty Information

Software Radio Laboratory LLC YouTube Video Channel

Quick FAQs:

Where can I purchase the QS1R Receiver?

  • QS1R Receivers can be purchased on line at: http://www.srl-llc.com
  • Please note that there are some on line scammers who purport to be European distributors of the QS1R. What they are actually selling is a low quality Russian copy of the QS1R with no warranty or other support. Buyers have reported that they either have not received anything after purchasing or, if they actually received hardware, that the hardware did not work.
  • QS1R Receivers are exclusively sold direct from the Software Radio Laboratory LLC factory in Columbus, Ohio, USA.

Where can I download the latest SDRMAX software for QS1R?

Does QS1R work with any other software?

  • Yes. You can use the QS1R with Winrad by installing the QS1R ExtIO support files. Sampling rates up to 2.5 MSPS with a bandwidth of 2 MHz is supported.

What power source does the QS1R require?

  • The QS1R requires 5-6 VDC @ 1000 mA when running SDRMAX software. When running CW Skimmer Server, the QS1R requires 5-6 VDC @ 2000 mA. The coaxial power jack is 2.1mm center pin positive. A 2.1mm or a 2.5mm center positive power plug will work.

Do you have a recommendation for a power supply for the QS1R?

  • You can order either a USA (120 VAC, 60Hz only) or Universal (90-264 VAC 50/60Hz) power supply from the SRL-LLC website. You should order the Universal power supply if you intend to run Skimmer Server with the QS1R because this power supply is rated at 2000 mA.

What is included when I purchase the QS1R?

  • The QS1R Receiver includes an aluminum enclosure and USB cable. The power supply can be purchased separately or the user can supply his/her own power supply. Two power supplies are available for purchase - a USA 120 VAC. 60 Hz input supply and a Universal 90-264 VAC, 50/60 Hz input power supply. The Universal power supply includes interchangeable blades to work with most countries power systems.