Monday, August 13, 2018

New 10W 40m QSX40 from QRP-Labs

I very much enjoyed building the QCX CW transceiver and there have been rumours that QRP-Labs was working on a sideband version. It seems the rumours are true and the kit is being built at a "Youngsters on the air" meeting in South Africa at the moment.

It seems that it's a 10W output kit for 40m (and presumably other bands too) but nothing formally announced or available for sale at this time.

All of this post is now redundant as Hans has posted info here. Can't wait to order one!

-- older comments below --

There's a few comments in the QRP-Labs forum, a tweet, and some clues in the Facebook page of YOTA. I'm very much looking forward to learning more about this kit.

Great that they're testing the build process on a group before launching it. I can wait and would rather build a debugged kit with accurate manual rather than rushing in too soon.

Just spotted this interview with Hans:


There's a lot of information in the video, I've taken notes to make it easier to take in. The new rig features:

  • 10W SSB, AM & FM
  • USB CAT control and Audio
  • USB host for keyboard to use with no-PC PSK31, RTTY & CW (decodes to the display)
  • Iambic CW keyer
  • 40m initially and later 10 band
  • Real time clock (with provision for battery backup)
Hans has worked on this for over 6 months.

Designed a 40m 10W SSB transceiver kit. It will also do AM and FM.

It's an all software defined radio, with no PC necessary. Internally it uses a powerful 32 bit ARM processor. The user interface is quite minimal, just two rotary encoders and four buttons. It’s designed to be used with a standard iPhone/Samsung headphone with mic. There’s an RJ45 mic socket on the back for a Yaesu/Kenwood standard mic.

There’s two USB sockets, one A and one B. You can plug in a USB keyboard which you’ll be able to use with PSK31, RTTY and CW. Decoding will be displayed on screen standalone - again no PC needed for those modes.

If you plug a computer into the USB B socket the rig will appear as a 24 bit sound card so you can use it with a PC for digital modes such as FT8.

Like last year’s QCX, it has built in test and alignment hardware and software.

It’s a high performance radio using a 24 bit A/D converter chip for high dynamic range and a 24 bit D/A on the output of the SDR. The large heatsink is designed to handle continuous digital modes without overheating.

In the next couple of months a plug-in filter board will be designed which will let the rig cover 10 bands from 160m to 10m. (This will include the 60m band).

There will also be an optional extruded aluminium enclosure.

The exact price hasn’t been decided but it’s hoped that the 40m single band version will be about US$75 and the whole thing including the 10 band filter board and enclosure will be about US$150.

There's a thread discussing this enthusiastically on Reddit.

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