There were many replies to my plea for help. I won't reply to all individually but every reply is much appreciated! Thank you all! To respond to a few things: I do not need a linear amp. I spent much
Hi Stefan, Your answer is not late at all. After working very hard on antennas the past days I am just now getting back to the little PA. About RF choke in the supply line: This is something I don't
OK. I understand the problems with having RF reach the meter and power supply. To be honest I don't fully understand what you are suggesting with a very small coil (few uH at best) and capacitor... O
Hello Rik, Thanks for the good suggestion. I tried it on a battery removed from my lawn mower. I won't be needing the lawn mower for some months! Running it from the battery does not significantly re
So as a final test today I put a 50 uH choke and then a bypass capacitor on the power supply side of it. With 100 uF I (oddly) found 2V pk-pk RF on the power supply. So it is worse with the choke plu
I have no words to express how much fun I am having just listening on 2200m! This has really put the fun back into radio for me. It will be even more fun when I get the transmitting antenna and trans
Hi Stefan, You are doing very interesting things on VLF! I don't understand most of it even after some time looking and reading the few relevant web pages I could find, but it is interesting to me an
Hi Rik, I agree, what a pity that the slower flavors of JT9 have been abandoned along with WSPR-15. I suppose we are too few in number to be important, and these modes are probably off little interes
I really appreciate your reports, seems you "da' man" for LF reception from EU at the moment, Stateside :) Perhaps, Chris, but you "da' man" for LF transmitting from EU to stateside. :) Congratulatio
I noticed last evening G8HUH was transmitting WSPR-15 on 2200m. I decided to try WSPRX one more time. For some reason this time it seems to be running OK! It hasn't crashed in more than 12 hours! Sad
Hello Chris, Not to worry. My life has its stresses and I often forget what I may have asked before. I tried OPERA for a while last winter/spring but some aspects of the mode turned me off and I chos
Same here but after waiting a minute or so the spectrogram fills in with data and everything works. I think it needs time to download or process data? Firefox Quantum 57.0.1 on Ubuntu. I must say alt
After something of a lull, trans-Atlantic propagation picked up last night. I've heard 2E0ILY now 9 consecutive nights, which ties our previous record for consecutive nights, but last night I heard h
How VERY disappointing. Last night was the first this season I noticed TWO stations transmitting late night that I should be able to hear (from across the pond). Unfortunately propagation completely
After nearly 10 months of planning and work, I am able to make my first transmissions on LF! I am running 10 watts from the transmitter. EIRP is a bit less than the claimed 0.1 watt. I am having some
Hi Stefan, Thanks! This has been a very exciting journey for me. I'm trying not to be too discouraged by early problems. I do use an isolating ferrite transformer at the antenna. It is very similar t
Hello LF enthusiasts, I am hopelessly behind in email after both PCs having issues in the past couple of days. First my linux computer suffered some file system corruption (annoying but easily fixed)
Hi Stefan, What ever the design is, i would use an isolating transformer. BTW how do you match the antenna feed point impedance to 50 Ohm then? Do I need two transformers? What I use now is three sta
Hi Stefan, The C on the gate is not a good idea i think. Better try a 10...22 Ohm resitor or a ferrite bead in front of the gate. I removed the C on the gate and added a 15 ohm resistor in front of t
Hi Stefan, Does the blue core become warm during operation? No, it stays completely cold. Same for the two cores in the LPF. How does the drain-voltage look like? It is hard to describe and so far I
