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I completed my 20M QCX and measured about 3.1 watts with 14 volts input using the onboard wattmeter, so I was ready to put it on the air. Assume that this is a satisfactory output. (Should I do

A frequent subject, dont see a path for me to pursue. Built qcx kit, December 2017 ship, group 2 board, made the three mods suggested (did RF choke pin 20 to 7 instead of Schottky). Start up was

Hi Martin, Flip the PCB over and you will see the unnamed terminals are on the same tracks as a named ones. Short answer yes you can connect +PA, +5v and Heat altogether. The unnamed terminals provide

As to enclosures, I didn’t get to it quick enough and my 14 year old ham made one out of Lego’s. Only temporary I hope. Don WB9STS

Hi Mario, Have you tried squeezing the two boards together, in rare instance the interconnecting plug / socket can oxidise and cause a poor connection? Also as noted in the assembly manual, the PCB

I assembled the kit (rev 4) without problems, tested per the manual with ~.5 watt output, installed gps module and got good locator,? calibrated WSPR and was received and decoded properly on my

In the manual?assembly_u3s_r3_a4.pdf on page 10 there are several circled in yellow, the lowest is not clear to me. Are the unnamed pinnes above +Pa +5V and Heat parallel with +Pa +5V and Heat? In

Thanks Alan, sounds like the thing to do on the short term until the bug is worked out with the keyer.

Hi A1aop, The solution to differing standards of key wiring has being reported before. The solution for straight keys / Keyers is to build a short adaptor lead, a 3.5mm line mono jack socket connected

Having the same problem no matter what paddle I use. Haven't tried an external keyer since the mono cord from the keyer shorts the rigs jack, unless I'm doing something wrong.

The clock and GPS kits are neat. Of course, I can't leave well enough alone so I am working on a portable gps/clock powered by four AA batteries with front panel switches to turn off the GPS and

Hans, is there a solution to my problem?

I've got 20m QCX S/N 924 working. I was getting the line of blocks, and L5 was showing 20MOhms. I replaced it with a 100uH on hand and fixed the problem. I've aligned it but it's late now. No mods --

Thanks Jerry, All great ideas. I will try them. I tend not to ground the filter since I don't always have it in line, I sometimes MW dx. Shack is on the second floor, though I do have a ground line

Yes the interference goes away. Looking to eventually case it up, I do have a tin that it fits in, just need to figure a way not to butcher it up. It would make a nice companion to my PFR3 for park

They are listed at 50K, but not sure it's that high according to a search on the station. Think they may actually be going off air and selling the transmitter site for developement. Last community

Thanks all for your answers. These confirm the issue I experience?is not due a technical failure / malfunctioning?but more due to structural reasons, which I'm going to investigate. 73 and thanks

Happy dance sure was too quick to replace that 10 pf 989.16uf works much better. Sure getting skilled at replacing parts especially this one Many tx for your support P

Thanks Alan. I deleted the old message because there is no edit menu on this group, so some readers may be confused. Revised message is here? -

Thanks everyone for your replies. I dug deeper into that junk box and came up with a carbon resistor and it measured 36 k exactly so i used it. now I am torn between finding a box or mounting every