Hello Andy and Hans, thanks for the report, Andy! Hans, I also think that there were some problems with your antenna. At 20180113 your signal in JN 59WK never exceeded 549 and I had to use my remote
Hello Roelof, concerning your lastest ECO-Mini-Whip: very exciting stuff! Would you already release a schematic? What about the lower frequency limit - could it be extended to VLF/ULF? Tu es 73, Tom,
Hello Paul, Thanks for the report - nice to come through to Todmorden straightaway! More infos about my station will follow soon. Location of the transmitting site: 49.4458 north / 11.8734 east, that
Thanks again, Paul - most encouraging results! Certainly IŽll dream on ... 73, Tom, DK1IS Am 28.01.2018 um 21:02 schrieb Paul Nicholson: With the terminator passing, a bad time to be taking measureme
Hello group, having been QRV on LF since 1999 and on MF since 2013 now I try to dream on VLF too. First test results on 8270 Hz were quite encouraging - thanks to all reporting stations and to Paul N
Hi Luis, the part number of the Murata inductors 10 mH/0.6 A (DC) in use here is 1410606C, see https://www.murata-ps.com/en/1410606c.html. There you can also get a pdf-summary of all available induct
Hello Paul, thank you for your post! Enclosed please find my comments: Am 05.02.2018 um 10:35 schrieb Paul Nicholson: Thank you Tom, that was a most interesting post with much food for thought. Nice
Hi David, most interesting! - Could you give some more information about QTH, TX and "Tesla" antenna? Tu es 73, Tom, DK1IS Am 09.02.2018 um 21:44 schrieb David Hine: Hi, I do transmitting on ELF occa
Am 10.02.2018 um 12:10 schrieb Markus Vester: Since 10:43 UT, I'm sending a carrier on 5170.0025 Hz again, feeding 0.2 A to my Marconi antenna in Nuremberg (49.4158N 11.1350E). Best 73, Markus (DF6NM
Am 18.07.2018 um 18:13 schrieb P. W. Schnoor: Hi, Anyone out there who could confirm a weak signal at 16 kHz? It appears around 0400 utc and disappears around 1900 utc since some weeks here at North
Hello group, To whom it may concern: cleaning up my old laptop I happened to find a file from Ben H. Tongue dealing with the optimisation of ferrite rod antennas: http://kearman.com/bentongue/xtalset
Hi LF, Mike and Roman, Thanks for your feedback! Sri, Roman, no more than five words of Russian here - so many interesting information being excluded! But at least the pictures tell a lot. Concerning
Hi Stefan, congrats for that ufb earth antenna experience! You have certainly seen it already: from 9 to 10 UTC there was a clear trace from the east at PaulŽs grabber: http://78.46.38.217/fbins3.htm
Am 24.09.2018 um 17:02 schrieb Paul Nicholson: I too would like to see some VLF signals! Some carrier perhaps? Am currently testing a new active antenna prototype, http://abelian.org/vlf/tmp/180924
Hello Group, Planning a new single-ended Class E PA for my activities on the Dreamers Band (8.27 kHz) two questions came up - perhaps someone can help me: - Being interested only in on-off-keying IŽ
Hi Riccardo, thanks for the link - I prefer the most basic version. But like in all other papers I know the problem of the first positive drive pulse after applying the DC power is ignored - perhaps
Hej Johan, thanks for your budding info! I would be glad to get these documents concerning the DC feed inductor. Perhaps youŽll find some additional information about the shunt capacitor problem too?
Am 09.10.2018 um 19:20 schrieb DK7FC: Hi Tom, Why do you decide for a class-E at all? Do you see any actual advantage over a class D? 73, Stefan Hi Stefan, A very good question! Knowing you are a ded
Hello group, Just to close this thread: Concerning the problem of the first drive pulse with DC power already on: Bob, W1XP, made an important contribution in a private mail. He pointed out that the
