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New box for dummyload
Nice idea! However, I would have used a BNC connector instead of the posts and used short straight wires to connect the dummy load. Your setup will work reasonably well for the lower bands, but introd
Nice idea! However, I would have used a BNC connector instead of the posts and used short straight wires to connect the dummy load. Your setup will work reasonably well for the lower bands, but introd
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jakob@...
· #64493
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Does QCX Mini have DIY emission indication function?
#qcxmini
Interesting! Are you sure the diodes are 1N4148? I will experiment with this circuit to find out how the led current is generated. Whatever it is, it is most likely a non-linear circuit and induces ha
Interesting! Are you sure the diodes are 1N4148? I will experiment with this circuit to find out how the led current is generated. Whatever it is, it is most likely a non-linear circuit and induces ha
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jakob@...
· #64336
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Does QCX Mini have DIY emission indication function?
#qcxmini
Is that a prank or can you explain this circuit's method of operation?
Is that a prank or can you explain this circuit's method of operation?
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By
jakob@...
· #64310
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Ultimate3S WSPR settings
I have seen that the middle frequency as well as both ends are busy. I recommend using a frequency around 40 to 60 Hz or 140 to 160 Hz above the base frequency. You may get more spots. AA0JR
I have seen that the middle frequency as well as both ends are busy. I recommend using a frequency around 40 to 60 Hz or 140 to 160 Hz above the base frequency. You may get more spots. AA0JR
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jakob@...
· #63952
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My new Ultimate 3S inspired me.
#u3s
I was running my U3S for a while in WSPR mode here in Arizona on 40 meter and collected nice overseas spots with about 1 Watt of output into a Windom antenna, as far as to Perth Australia, Antarctica,
I was running my U3S for a while in WSPR mode here in Arizona on 40 meter and collected nice overseas spots with about 1 Watt of output into a Windom antenna, as far as to Perth Australia, Antarctica,
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By
jakob@...
· #62716
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Voltage Regulator - QCX Mini
0.6 volt is strange. You may have created a short circuit somewhere on the power rail. I would remove the AMS1117 and feed the 5 volt directly into the Vout pin, using a power supply with current limi
0.6 volt is strange. You may have created a short circuit somewhere on the power rail. I would remove the AMS1117 and feed the 5 volt directly into the Vout pin, using a power supply with current limi
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By
jakob@...
· #62320
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U3S fw 3.12 no heartbeat no cal
Check if the 1PPS 2ignal gets through the MCU at pin 28. Maybe it is just a wiring issue between the GPS module and the main board assembly. A oscilloscope or even a simple analog voltmeter can be use
Check if the 1PPS 2ignal gets through the MCU at pin 28. Maybe it is just a wiring issue between the GPS module and the main board assembly. A oscilloscope or even a simple analog voltmeter can be use
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By
jakob@...
· #61965
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A word of advice
A good discussion here! I agree that Hans has one of the best kit building instructions, maybe just one dB behind Heathkit. Don't discourage people from trying to build kits. It is rewarding. Even a f
A good discussion here! I agree that Hans has one of the best kit building instructions, maybe just one dB behind Heathkit. Don't discourage people from trying to build kits. It is rewarding. Even a f
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By
jakob@...
· #61693
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QCX Mini, expected ETA
#qcxmini
Thanks, Hans, for the good news. I will keep my soldering iron on stand-by :-). Happy Holidays to you and your team and families!
Thanks, Hans, for the good news. I will keep my soldering iron on stand-by :-). Happy Holidays to you and your team and families!
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jakob@...
· #57603
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QCX Mini, expected ETA
#qcxmini
I ordered a QCX Mini on 12/4. The current status of the order is 'Processing US'. Did I miss the first batch? Does that mean I need to wait for the second batch? What is the ETA? Sorry for being impat
I ordered a QCX Mini on 12/4. The current status of the order is 'Processing US'. Did I miss the first batch? Does that mean I need to wait for the second batch? What is the ETA? Sorry for being impat
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By
jakob@...
· #57555
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
All, I wrote a text this morning, but I think I discarded it rather than pressing the Reply to Group button. Whatever. Good news: after a factory reset, as many of you suggested and directed me to the
All, I wrote a text this morning, but I think I discarded it rather than pressing the Reply to Group button. Whatever. Good news: after a factory reset, as many of you suggested and directed me to the
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By
jakob@...
· #54373
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
Thanks, Alan, and all others mentioning the factory reset. I did it. Holy Cow! The cycle works now. A great success, despite the fact that I had to make about 30 round trips in the settings to get all
Thanks, Alan, and all others mentioning the factory reset. I did it. Holy Cow! The cycle works now. A great success, despite the fact that I had to make about 30 round trips in the settings to get all
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By
jakob@...
· #54342
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
I spent a few hours yesterday trying to understand the problem better. I have no new information, other than 1. Since about a week, after the transmitter worked properly on the 30-meter band for sever
I spent a few hours yesterday trying to understand the problem better. I have no new information, other than 1. Since about a week, after the transmitter worked properly on the 30-meter band for sever
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By
jakob@...
· #54282
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
I have further tested the U3S. The problem occurs on all 6 bands, with antenna or dummy load. I have re-arranged external cables too. No difference. It is now very clear to me that the program is corr
I have further tested the U3S. The problem occurs on all 6 bands, with antenna or dummy load. I have re-arranged external cables too. No difference. It is now very clear to me that the program is corr
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By
jakob@...
· #54167
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
Hi Shane, leaking RF is a very good point. I did not think of that. I have a bunch of RF chokes on order with Amazon and should get them in before the weekend.I will experiment with them and keep you
Hi Shane, leaking RF is a very good point. I did not think of that. I have a bunch of RF chokes on order with Amazon and should get them in before the weekend.I will experiment with them and keep you
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By
jakob@...
· #54124
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
Thanks, Shane, for coming back on this issue. I made it 6 bands and ran it on all bands during testing. The problem is not the 30 meter LPF, since the system worked well until a few days ago, and even
Thanks, Shane, for coming back on this issue. I made it 6 bands and ran it on all bands during testing. The problem is not the 30 meter LPF, since the system worked well until a few days ago, and even
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By
jakob@...
· #54090
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U3S WSPR on 30 m Error after transmission
#30m
#u3s
I ran a U3S for several weeks on WSPR in 30 meters, 0.6 watts into a magnetic loop antenna. Since two days, all of a sudden, the transmitter does not stop sending a carrier after the 161 elements. It
I ran a U3S for several weeks on WSPR in 30 meters, 0.6 watts into a magnetic loop antenna. Since two days, all of a sudden, the transmitter does not stop sending a carrier after the 161 elements. It
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By
jakob@...
· #54054
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Ferrite_material
Thanks a lot, Graham. The catalog contains all I wanted and it has a good resolution for my aging eyes. 73 de AA0JR Jakob
Thanks a lot, Graham. The catalog contains all I wanted and it has a good resolution for my aging eyes. 73 de AA0JR Jakob
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By
jakob@...
· #53132
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Ferrite_material
It is a picture stored in a PDF file. When I zoom I get the usual picture pixelation and artifacts. Native PDF has a vector zoom and remains sharp with all zoom settings. I use the original Adobe Acro
It is a picture stored in a PDF file. When I zoom I get the usual picture pixelation and artifacts. Native PDF has a vector zoom and remains sharp with all zoom settings. I use the original Adobe Acro
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By
jakob@...
· #53094
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Ferrite_material
Thanks for the info. Do you have the picture in higher resolution or each graph on a separate sheet, It is hard to read with older eyes. 73 de AA0JR Jakob
Thanks for the info. Do you have the picture in higher resolution or each graph on a separate sheet, It is hard to read with older eyes. 73 de AA0JR Jakob
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By
jakob@...
· #53065
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