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Jim, I changed the colour of the led on my high band QDX. 73 John M0JBA

I use JTDX but maybe wsjt-x is the same. The low band units power up on 40 meters. The High band units power up on 20 meters. Tony AD0Vc ________________________________ Sent: Thursday, July 27, 2023

For those of you who think there are no dumb questions ... how do I tell a high-band from a low-band QDX?? There are no markings on the cases and WJST-X happily changes bands from 80m to 10m without

Happy Birthday! Great work. I just finished packaging my GPS complete with buck converter to make it field ready. Can't wait for additional functionality. The sat info in the terminal is very cool!

The pads are too delicate to be drilled up to the correct diameter.? Also you will lose the plated thru hole solder.? I just wound T203 with 0.5mm enameled and then noticed that T204 PCB holes are

And my favorite part of the USB-c spec, it has a pin that can indicate to the device which way you plugged it in! And yes, I’ve also seen a non-zero number of things that don’t work without the

Sto Lat, OM! JZ KJ4A wrote:

Happy Birthday Hans! I hope you have many, many more! 73 Evan AC9TU

Happy Birthday Hans! Cent'anni. Rich

Don't forget to add that the USB-C connector can be inserted upright or inverted, it doesn't care! No fiddling about, just slip it in. Higher current, too. About power negotiation: No worries unless

High band will be soon, guys... I have 10,000 T30-17 coming from micrometals now! It's gonna take a couple of weeks still though to reach me here in the furthest hidden corners of outer nowhere.

Don wrote "No smoke. No heat effects visible. No discoloration. It's at peace now." That sounds like oxide layer failure. Hit a critical Vdd voltage and it happens in nanoseconds. Crunch! JZ

Hi Allison, all The USB-C connection in QMX only uses a USB-2 data-only connection. Only three signals are connected: Ground and the USB-2 standard differential pair. No other of the USB-C signals or

Hi all Since tomorrow is my 52nd birthday and I don't know if I might get interrupted by kids etc., and after that is the weekend, I wanted to release the firmware as far as I have got so far this

Received! #72829 in the shack, waiting... 73 Karl KI4ZUQ

Don, I think the diode was probably a victim of some other failure along with the MCU. The MCU absolute maximum Vdd is spec'd at 4.0 volts. My experience is that is a guard banded figure and failure

The MPU is internally damaged. All VDD inputs measure less than 2 ohms to ground. I confirmed this sad fact by individually lifting those pins. The only MPU VDD load is just the VDDA and the VDD bus,

Hi Allison, As I mentioned, the part looked pristine but performed "mushy", not open like electrical damage would be expected to produce. Have you ever had a zener change like that? The QMX was fully

And, anyone else wishing to join us...feel free!? Our QSO partners run anywhere from QRPpppp to SB-220 at full Gallon +++ and stacked multi-element arrays! 72, Bill, N4QA

Likely true, there are many limits to available current but then the Zener?even if a 400mW device would die at 120 ma from over dissipation. That's likely to not generate much heat. However the diode