Thanks Jay, I will try that when I get Spectrum Lab installed. I'm about due for a couple of days 'down time' to be used for installing new software for various LF activities. Paul
Last night Chris 2E0ILY and myself completed a DFCW60 QSO over a 4731 km path on 137 kHz. To my knowledge this is the first USA to Europe two way amateur radio QSO on the band. My sincere thanks to C
Hi Alex, For my side TX QRP Labs U3S, 200W (0.5W EIRP), 27m vertical with top loading RX 9m LNV, home made SDR 73, Paul N1BUG On 03/28/2018 03:41 PM, Alex R7NT wrote:
Thanks Markus, Also thanks for the file. Kilowatt-hours were not so bad here at 175 to 200W transmitter power (depends on R of antenna which is always changing a bit)... but maybe Chris doesn't want
It has been brought to my attention that there were two way contacts between U.S. Part 5 stations and the UK (and perhaps other Europe) some years back. I did not know that some Part 5 licenses were
Some months back, Andy gave me this formula for calculating power out of a single ended (class E) PA. It has been very helpful. Pout max = Vdd ^2 / 2 / RL Is there a similar formula to calculate powe
There is still life in the band! I returned to WSPR-2 for a bit last night. I was heard by DL/SWL. I am pleased to report I heard EB8ARZ/2 for the first time. I hope he is checking WSPRnet to be awar
Hello Rik, Thanks for this information. I had only the knowledge that 50V=1000W, 30V=350W. From this I tried to "invent" some math and thought that 13V=65W seems about right. :-) But I wasn't sure. 7
Hello Domenico, I am not yet using EbNaut. Seems not any time soon for me. But I am very interested. I want to say thank you for taking the time to develop and share this application. As I said befor
I had a few minutes between meetings so I tried it... It will not install in Windows 10 64 bit. There were some error messages in Italian which I did not understand but the installation failed. 73, P
OK, thanks Rik and Roger. I tried again following Rik's instructions and it installed without problems. I need to brush up on my Italian. :-) So far I cannot get EbNaut-rx to decode anything but I am
Here is the problem I am having. Notice the calculated time offset: http://www.n1bug.com/eb1.jpg If I run EbNaut-rx with that I get: http://www.n1bug.com/eb2.jpg If I edit the time in EbNaut-rx to 16
Hi Roger, I was just following the screen shots in Domenico's original message, which show message length 6. When I change it to 5 I get DF6NM. Changing the message length to 6, frequency to 137.5220
Hello Tony and group, OK but how to change the date? It is calculated automatically by EbLaunch, we cannot edit it in the program. I edited the original raw text file to reverse the day and month. Th
It seems I'm in over my head again. I'm having difficulty getting my newly built W1VD kW 137 amp to run correctly. I think the problem may be with my driver board. Question 1: Could anyone with a kno
Jay, Thanks for the detailed response! See below, threaded in. Done, verified that it looks OK with scope. (Previously I had not been testing with the DC offset!) I've reduced drain voltage to 13V
Jay, That comment about the 'bobble' is one of the most interesting and useful bits I've read in a long time! I have to run too. I will apply 13V, check drain waveforms under these same drive conditi
Waveforms... Conditions for all below: Drive is from the HP 3325B at 2Fo, 5V square wave, 2.5V DC offset fed into amp driver board. Amp output through LPF into a quality dummy load (250W 50 ohm flan
Thanks Hugh and everyone else who commented and provided tips on my earlier post about this amplifier. I will wait for Jay to have a chance to comment but I *think* I'm OK on timing of the phase tran
Hello Chris, There are plenty of possible causes here I think. When it comes right down to it, I'm not at all happy with the end result of my construction on this amp. If it ends up not working, it's
