1. Don WB0LQW 2. Dave W0DF (good in QRZ except zip code is wrong, should be 63303 vs. 63301) 3. Dave W0DF 4. Chuck K3FLN 5. Jim W3APC 6. Gregg N6ZUE 7. Gregg N6ZUE 8. Gene K6BEK 9. 10. 11. Still more

Geoff, As in the case of QCX, one can reduce the output power of QDX to a WSPR safe level by reducing the DC supply voltage below the design level for 5 watts (12 v or 9v—depending on the chosen

WOW, terrific news. Can you please explain how you reduced your transmit power to 200 milli Watts. When my kit arrives, I anticipate that it will be used on FT8 and JS8 at the 5 Watts but not on WSPR

Something to remember about Taiwan being a global giant in semico mfg: If (read WHEN) Red China invades Taiwan, one of two things will occur. Either the Red Chinese will suddenly own practically

Hello, I double check the toroids and an injected signal is going throw the filters to the FST3253 input. But nothing at the output.... I changed two times the FST3253 and had no success. Perhaps the

Hello Roelof, Many thanks for the feedback. In fact I think that the 40m LPF cut off is starting to fall off before the 40m band starts. Slightly less induction or a tiny amount of additional

I am building my own multi-band, Arduino VFO driven, CW TCVR. This is based on the GQRP Sudden VFO but with significant coding changes (by me) for multi-band use. The VFO will drive a QRPLabs 5w PA

Hello Mike, The cut-off frequency of the 20M low pass filter might be too low, which attenuates the 20M output somewhat. This does not effect 30M. 73, Roelof, pa0rdt

My pleasure Jim!

Jim, I read most posts, I see large variations on different sweeps posted from various QDX rigs. I'm beginning to think the actual figures are meaningless although the relative values might make

Randy, I would verify that the 20 and 30 meter transmission is enabled in the configuration menu. A couple of reports have resolved to these not being turned on in the software. They did not disable

Colin, Thank you. My QRP minis are now all settled in their new stands! 73 Jim W3APC

So did you inventory all the parts before you started your assembly? It is always a good idea to do an inventory first. It helps one get familiar with all the bits and pieces. I use an inventory and

Hi Jim, The more recent fabs are pretty much closed-loop using recycled water. If you want to see real wastes of water in the Southwest, take a look at fountains that shoot water two football field

Evan and Ryan, thanks for your help. Evan, I believe I've got the v1 board, as I can't find a version reference on either side of the board. The firmware is the latest 1_03. Per your guidance, I've

Many ASIC designs could also be done as a FPGA first, further speeding up design and verification. The prototype could be a power hungry but otherwise exact logical equivalent to the final ASIC

Hi Mike, Your RF sweeps look very different to the ones I posted for my 12v v3 QDX… https://groups.io/g/QRPLabs/message/87810 The left hand scale on my graphs range between -10 and -30 approx. Yours

Hey everyone, here is the first in the series! It's on the too-long side, but... it is what it is. It's installing all the capacitors and also the diodes, and the capacitors took some real time. The

Once upon a time in the 1980s when chips were made out of stone (a little silicon humor), the U.S. Department of Defense (DoD) cared about one thing -- CPU speed. That was where the intellectual

Thak you very much Mike I have very different from mine. I can send them later. But I have good reference now. 73 de oh2awg, Esa N On 29.6.2022 21.20, Mike GM1RHV wrote: