• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

KB6NU's Ham Radio Blog

KB6NU's Ham Radio Blog
  • HOME
  • Study Guides
  • Teach a One-Day Tech Class
  • W8SRC Repeater Guide
  • Advertise
  • Hire Me

Amateur radio videos: (tr)uSDX

February 18, 2022 By Dan KB6NU 3 Comments

So, a couple of days ago, a guy in our club posted to our mailing list that he was thinking of starting a group buy for the (tr)uSDX transceiver and  included a link to the video below:

Here’s a description of the little transceiver:

The (tr)uSDX is a 5-Band / Mulitmode QRP Transceiver in Pocket Format (90x60x30mm – 140g). It features a highly efficient Class E PA and Supports CW/LSB/USB and AM/FM. Right now it covers 80/60/40/30/20m and in Future there will be support for 17/15/12/10m as well.

It is supplied with an OLED Display, onboard Mic, (tiny) onboard speaker and for improvised QSO onboard PTT Key can be used as emergency CW Key. Further on, the (tr)uSDX has a (Micro)USB CAT and Programming Interface, and while it produces typically 5W @ 13,8V Power Supply, it can create 0,5W Output from 5V USB Supply alone.
Typically it draws 80mA on RX (with MS5351 – less with Si5351) and 500mA on TX @13,8V and typical 85% PA Efficiency. It is supplied with OnBoard SWR Bridge and Voltage/Current measurement Hardware, to help in tuning and operation.

Talking about the on-board test equipment, here’s a short video on how that works:

The guy says that if we do a group buy, they’ll cost about $60. That seems pretty cheap, since in single unit quantities, they’re selling for closer to $100. Here’s a video of the designer unboxing a kit from one of the Chinese suppliers:

I don’t know where the guy is going to be making the group buy, more than a dozen club members have signed up so far. I need another project like I need a hole in the head, but I’m going to get one, too.

Related posts:

  1. Winter 2012 TAPR Journal now online
  2. Got a QRP amp recommendation?
  3. Random stuff: NBC on HI emergency comms, Echolink maker’s net, WebSDR
  4. From my Twitter feed: How to remove battery corrosion, how to use your NanoVNA, another Chinese SDR

Filed Under: Gear/Gadgets, Kits, Software-Defined Radio (SDR) Tagged With: (tr)uSDX

Reader Interactions

Comments

  1. Larry Hamre says

    March 5, 2022 at 2:44 pm

    Greetings: Have a usdx trx and the voice quality of the rig poor when the person is hearing me, It breaks up bad. What should I do and do you know anyone the could look at it and maybe reapair it? Thanks AI9N

    Reply
  2. Nate says

    March 7, 2022 at 9:27 pm

    Can this use a 12v battery?

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

No Nonsense Technician Class License Study Guide (for tests given between July 2026 and June 2030)

New No Nonsense Technican Class Study Guide now available!

The 2026 version of my Tech Class study guide is now available, and as always, the PDF version is FREE!. The ePub version costs $11.97, and a Kindle version and paperback version will be available on Amazon shortly.

Click here to get all of my "No Nonsense" study guides.

Also available: The CW Geek's Guide to Having Fun with Morse Code

W5SWL.Com
Retevis Ailunce H1 DMR Radio
DXpander: Cobweb antennas, Laser Cutting

You’ve got mail!

Enter your email address below and get an email every time I publish a new post.

Email


I frequently teach classes to help newcomers get their licenses. The next class will take place on Saturday, October 10, 2026 on the University of Michigan campus. Click here for more information.

If you can't make the class, subscribe to the mailing list to be notified of when the next class will be held.

You can always download my free study guide, and if you have any questions about the classes, or amateur radio in general, please feel free to email me directly.

Support KB6NU.Com

Donate $7.30 and get two of these cool stickers. Measuring 4.25-in. W by 2.75-in. H, it's perfect for your car, your shack, or wherever!

Contact me

If you have a question or comment about one of my blog posts, or a question about any of the material in my study guides, or just a question about ham radio in general, you can email me at [email protected].

Blogs You Should Also Read

  • AE5X: A CW-centric blog from Kingswood, Texas
  • K0LWC Blog
  • LA3ZA Ham Radio Blog
  • Little Radios, Big Fun – WB3GCK
  • Mr. Vacuum Tube's Blog
  • Radio Artisan – K3NG
  • The K0NR Weblog
  • VE3WDM's QRP Ham Radio Blog
  • W2LJ’s Blog

Ham Radio Websites

  • Dashtoons – The Hammin' Comedy by Jeff K1NSS

Podcasts

  • ICQ Podcast
  • Linux in the Ham Schack
  • No Nonsense Amateur Radio Podcast
  • Resonant Frequency Amateur Radio Podcast

Recent Comments

  • Bulin 47 AI on ICQPodcast Episode 485 – World Cup Special Event Station
  • Jesse Alexander on What do you think of this artwork for the ham radio EMF Explorer
  • CADProps on My first go at 3D printing not quite a success
  • Dan KB6NU on A Media Guide to Amateur Radio
  • Steve Stroh N8GNJ on A Media Guide to Amateur Radio

Meta

  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org

Footer

Copyright © 2026 Daniel M. Romanchik, KB6NU · Log in