To be very clear: I didn’t buy the uSDR hoping that it might be a choice field radio. I’ll now wait for it to arrive (hopefully) sometime in early December. The eBay implementations also often suffer inferior components and poor design choices which are not compatible with the original uSDX design.Īfter receiving this reply, I searched eBay and purchased a uSDR/uSDX from the seller with the highest customer service rating. It’s very clever technical work by PE1NNZ and subsequent developers, but it has significant performance limitations due to the low CPU power available in the ATmega328 and the limited resolution of the 10-bit ADC in the ATmega328. The uSDX, and particularly its eBay implementations, are not a high performance transceiver. The word “QCX” should not appear in the title since it is totally inaccurate and misleading. His github page still has this “QCX-SSB” on it, and since some of these eBay sellers have ignorantly copy-and-pasted, “QCX” appears in the title… which does cause some considerable confusion… since they are not QCX. The uSDX project was originally called QCX-SSB by Guideo PE1NNZ because he made some hardware modifications to QCX and wrote his own firmware. If you look at the uSDX group you will see quite a bit of discussion about this recently including opinions on these particular radios you mention so please take a look there. Having said that, you may question what quality and support you will get. They aren’t “clones” because uSDX is open source and any productions of the radio by anyone are legitimate. The radios being sold on eBay, AliExpress etc are versions of uSDX. USDX is not affiliated with QRP Labs or supported by QRP Labs. uSDX is an independent open source project. Later work by Manuel DL2MAN encouraged more interest and the uSDX spun off into its own separate project, with its own discussion group at. USDX is an SDR transceiver that was originally developed on the hardware of the original QCX by Guido PE1NNZ. If you see any QCX clones anywhere (eBay, AliExpress etc) please inform us. QRP Labs is a commercial venture and all software, designs and hardware are proprietary to QRP Labs. The QCX transceiver is a high performance 5W single band CW transceiver, designed by Hans G0UPL and produced by QRP Labs. They have their own hardware, own firmware, own functionality, and own performance. They are versions of the uSDX transceiver.
NO! They are NOT clones of the QRP Labs QCX-mini 5W CW transceiver (see qcxmini). The question keeps coming up, about the radios called QCX-uSDX (and other such variants of name) on eBay and elsewhere: Hans wrote the following ( click here to read the original):
Hans decided to post his reply to me on the QRPLabs blog because he’s been asked this question so much. So, I wrote Hans Summers (G0UPL) at QRPLabs and asked for his input. I decided I’d go straight to someone I trusted and ask whether the uSDR/uSDX is, indeed, an illegal clone. Thing is, I’ve avoided even mentioning this radio because I was under the impression it was an illegal clone of either the QRPLabs QCX or PE1NNZ/DL2MAN’s work. Over the past month or so, I’ve gotten a bazillion questions from QRPer readers and YouTube channel subscribers about this particular sub $200 eight band QRP transceiver. This, after I promised myself “no more radio purchases in 2021.”ĭon’t ask for details, but I very easily justified each purchase. Yes, I bought no less than two QRP transceivers this week. Ignoring the fact that we did some repairs to the ActivationMobile (our Subaru), and the fact we just committed to a pretty pricey arborist quote for tree work at the QTH (those guys do earn their keep), I also spent some of my hobby money. It being a rainy, cool day, I was the only visitor at the park.Īs I walked into the shelter and sorted out which table might serve best as my field shack, a random thought popped up in my head: “ OM, this has been an expensive week for you!“ Yesterday, it was pouring rain but I had a hankering for some radio therapy, so I popped by Tuttle Educational State Forest (K-4861) knowing that they have a large covered shelter where I could set up the Elecraft KX1 and AX1 antenna and play POTA.
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