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Any chance of there being a QSX xcvr kit in 2022? 73, Randy, KS4L

The total payload weight for my lora tracker including pcb supercaps and solar cell is 13 gms .Am? I likely to get a stable float height of about 12000 meters with a single 32 inch diameter fully

I suggest continuing with the alignment and see how that goes.? Maybe some stage further down the line is in saturation throwing us off the track. I built my last QCX+ up as a uSDX.? I have the C1

Lora tracker now working OK on solar. Needed the inclusion? of 2 supercaps in cct Thanks to all the help from Mustapha Tan. Any progress on the integration from Helium to aprs-fi Thanks Richard

Thankyou Gyula, I have downloaded the file and will get round to reading it tonight. 73, Mike

Mike, i built this on a pcb board, you can see it here: /g/SoftwareControlledHamRadio/topic/85716281#13067 You will find what you need to build in the article above. -- Gyula HA3HZ

Greetings Folks. I need an AM lf/hf signal generator to make my life easier when re-aligning a 9R59 receiver, FM might be useful too. Has anyone achieved this with the SI5351 or an AD9851 ? tnks,

Looking at the solder side of the board I spotted a few solder shorts + lots of suspicious joints. it is always easier to blame faulty components rather than faulty work.

This exactly. I could've been less laconic about it, but that's all I was saying. It's the size of a deck of cards. -- Ryan Flowers - W7RLF MiscDotGeek - QRP and More (Website) (

Thanks for taking the trouble to answer my questions, Bill; everything sounds reasonable. You didn't tell me about the impedance of the headphones; the QCX doesn't like low impedance headphones or

Bryan, Point F should be close to the supplied voltage when keyed without any RF input to the amp.? This is because there is no RF pumping to get the voltage up using D2, D9, D10, D4, and C10 as a

Keith I think we may be giving the cap too much attention. Possibly all but one or two connections may be good. Prime suspects include not have conductivity one or more spots on T1 or one or more

Agreed. Don't pull that capacitor until absolutely sure it's bad. Highly likely that it's OK. Did you do the continuity test I mentioned from the hot side of C1 (pointed end) to ground? That will

Ya, Ron, I wondered about that. ?But, I'm a little concerned that if I pull it, it'll be the dog's butt trying to get it or a replacement back in.

Hi Juliann The oscillation or squeal has always been present in this build. I have an original 30 m QCX and a 17m QCX mini that have no problems. The intermittent nature of the problem is frustrating,

Sorry Keith but testing that capacitor without removing it from the circuit will not give accurate (or any) results. Ron

Curt, many thanks for your suggestions. ?Yes, working from the TOP of the board, and checking just the visible solder pads around the inside and outside circumference ?of T1, I have continuity

Ron, if it's a bad C1 then probably I made it that way. ?Using the Capacitance ?function on my DVM, which works fine for the little ceramic caps, I can't get any readings between the center and

Keith The C1 peak isn't greatly pronounced. I don't know if you started calibration that requires nulling of 3 pots, but success here is some confirmation of T1 viability. I still wonder if you are

Keith, there aren’t many cases of bad C1s out there since the part was changed to this ceramic version. Please check for continuity from the center pin (pointed end) of C1 to ground to verify good