If you want a fancy screen and user interface the best way is, design that separately and connect to the QCX/+/mini using CAT. All the QCX functions are available via CAT. So theoretically it should b

Hi Halden SiLabs engineers confirmed somewhere on their forum that although the datasheet says the reference crystal should be 25 MHz OR 27 MHz, in fact anywhere in the range 25-27 MHz os what they re

#synth

Thanks Alan Lots of good info there. One point though - reconfiguring QLG2 output sentences is NOT required to work with QRP Labs products. The QLG2 will work with any QRP Labs products in the last 6

Hi Tom Yes, sort of... Certain NMEA sentences got renamed. For example the most important sentence is $GPRMC which contains date, time, location and fix status. Really, "GP" stands for "GPS", the US s

Hi Bob Yes. Just flash the .hex for v3.12a (Ultimate3S firmware). 73 Hans G0UPL http://qrp-labs.com

#firmware

Hi Mike Nothing at all will prevent you from keying two (or more) QCXs at the same time with the same paddle. Assuming of course that the they are both connected to a common ground. 73 Hans G0UPL http

Hi all The waiting list for assembled QCX-mini kits is getting shorter daily, but still long. Most people ordered and acknowledged my estimated 10 week waiting time but for people who ordered in early

Hi Richard Wow, sorry about that, that's embarrassing :-/ I'm not sure how that escaped my attention during testing... I will have to be very careful of that in future. I'm glad you found it quickly.

Hi all Perhaps I may be accused of bias and after all, this IS the forum for QRP Labs products. But... most definitely RF Zero is NOT superior to Ultimate3S in every way. No doubt RF Zero is a very fi

#programming

P.S. I forgot the link to the antenna info http://hanssummers.com/404ul

Peter, Ken, Roger Yes I have a 20m receiving station that is active 24x7 except when I wish to use the antenna for other purposes such as QSOs (regrettably infrequent). The receiver is the QRP Labs re

Hi Bernie QCX+ has only two pre-mounted SMT components, the rest are through-hole. The SMT are Si5351A and FST3253 ICs. During testing of 1,000 QCX-mini batch 2 boards I did not discover even one sing

Hi WE8TOM It is possible but would require hardware modifications. You have 16 different transmission settings, each of which can be on any one of 6 different bands (controls relays on the low pass fi

Hi Roy This has been discussed before and is already on my list of requests for the U3S. Despite the fact that the Ultimate3S chip is completely full with zero bytes free space, I did do some work on

#programming

Hello Holger Lift the ground pins a little so there is a small gap between the PCB and the connector body. This should fit best in the enclosure. 73 Hans G0UPL http://qrp-labs.com

Hi Mike The page is at http://www.qrp-labs.com/ultimate3/u3mods/u3gpsref.html I am not sure why the hanssummers.com link redirects to the wrong place, but I can fix that. Can you clarify, how you came

Hi Mont Why do you think it is a very old website no longer maintained... it is my hobby projects website, active since 1999. So yes, very old... but certainly not "no longer maintained"... True enoug

Worth mentioning that if you have a Rev 2 QCX-mini it's not necessary to panic about this anyway. The 78M05 regulator is just impossible to kill. Certainly not by a momentary short. 73 Hans G0UPL http

#qcxmini #qcx #ptt

Hi Colin Yes I believe that is correct, Q10 should be replaced. As I mentioned, the "diode voltage drop" measurement is not an exhaustive test, some failed op-amps would pass this test... but if you s

Hi all Thanks for all the comments and I am glad you found the video of interest. Some answers to specific questions are below. Steve K1RF: > Only question I have is whether the defined tests would ca