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With it in the condition you mention where it’s generating what sounds like the 700 Hz test tone even though you aren’t in that test mode, it would be best to use a scope and see which stage is

Yes, and nobody remembers '/Project Genetrix/'. 73 de LA9XKA - Per -- Denne e-postmeldingen er sjekket av AVG-antivirus. www.avg.com

I'm building my third QCX+, this one for 20 meters. Getting close to the point where I wind L3. On my 30 meter unit I had to clip a lead, remove two turns, and re-solder the coil to the board. As Hans

Factory resetting didn't help. What would I be looking for in terms of oscillation in the filter stages? Are we just talking about either a short between the input and output of one of the op-amps/a

I think the 58 mA without backlight was with the original Mini design using the low current opamps and the original voltage regulator. Some of those parts were changed and the current drain went up.

OK Jake, I think you may have an oscillation in one of the audio filter stages ... IC8A or B or IC9B. But first, since you see the different stuff every time you turn it on, I think it would be a good

Is that something to do with the PPS being for "the second I'm now telling you about on the serial interface, but which you haven't fully received yet"? 73, Willie N1JBJ

IC10 gives 5.8V on all pins except for 0V on pin 4 and 12V on pin 8. The volume is indeed very loud, it is only bearable to wear the earplugs in maybe the lowest 5% of the volume knob travel. Also,

Hi Al I have 2 QDX Ver 4.0 s (10 total) One that had the problem came with the QDX Ver 4, the other QDX Ver 4 came within the same shipment had no problem... The working BN43-202 was also from QRP

Peter, With the one I tested (and I do not think the QLG2s I now have are different) Galileo worked, my notes give restrictions of combinations. As Hans says, no. I *think* a proper backup battery

Don, my measurements (with a Fluke 179) are roughly the same as yours on my 40m QCX-mini on a 13.3V supply: about 86mA without backlight, 100mA with. Given that the manual shows draw of a (stock)

I dont think they are worrying about a balloon,? i think it is a distraction from something else john spendlove wrote on 2/4/2023 1:26 AM:

Hi Peter Commands aren't remembered in NVRAM. You need to reissue commands after power cycle. I believe you are correct about the timestamp. 73 Hans G0UPL http://qrp-labs.com

Hi Jake. The 5 volts on pin 3 (as well as 1 and 2) of IC9 is correct. The 2,2 volt readings are also close enough. But you didn't mention IC10 unless it was grouped with all but IC9 in the discussion.

Alan, Thanks for the reply.? I do have Simon's procedure linked in mine as the source.? I just wanted to make sure I did not step on too many toes by publishing mine. Thanks very much! Mike

Having looked at that English version more carefully, it raises more questions than it answers!? For example, if you look at command 151, it says that Galileo is not supported in this firmware level.

Lots of emotion is right.? Modern journalism is a sad affair.? You don't have to be accurate or right, you just have to be first to put the "news" out. Joshua

Upon completing the QCX Mini, I set the reference frequency to 25MHz (TCXO); then tried adjusting the bandpass filter. Adjusting C1 changes the audio output amplitude, and a maximum can be reached

Good news, thanks for sharing! Can you describe the differences between the two versions of T1? Thanks! --Al WD4AH

Hi All Have a look at this. https://en.m.wikipedia.org/wiki/Loon_LLC I was able to track these using one of the plane tracker apps on my ipad. This stuff has been going on for years WRT to adjusting