Hi everyone, I just received the following message from groups.io. This upgrade will be happening on Thursday. Poat on the site if you see any problems. Thanks. Web And App Improvements We are

Hello Paul, I would also like to thank you for the report and for the spectrogram at 5170.03 Hz. With corrected direction and some searching when selecting the rectangle for the measurement, I even

We both missed the hard coded '4'. A more polished script would give a -oh option to vtsidex and look for the column heading 'cp1' to know which field holds the phase. I leave that as an

Hi Paul, My apologies for missing this! This is just more motivation for getting the H field receiver prototyped and built. It looks like this was successful! Here is the output: ./sidslope NML

I ran the 5170 Hz spectrogram, to get http://abelian.org/fbins3.html#r=vlf1&f=5170&p=1713322800&b=090&s=sp&m=cardioid&w=r&h=62&z1=0.34&z2=0.64&c=1&mb=485,43,514,110,0 which is showing 60nV/m. Once

Ah, I see why. Look for the line: if (sizeof( fields) < 4) continue; // Skip any empty lines Change the 4 to a 2, that will help! I've got two more amplitude channels. Also, change the

Hi Paul, I really appreciate this! On the Ubuntu 22.04 system I have vtsid running, I actually had to download and manually install Pike because there was no package available and I did an apt-get

Hello Paul, Thank you very much for your report about my broadcast on 8270.03 Hz on April 15, 2024. There were a lot of thunderstorms that day, but I really wanted to test my Earth Loop after the

I attach a little pike program to do the median slope thing. Save it and make it executable with chmod +x. We only need the slope, not the intercept, so no need to do the full Theil-Sen. Look for

Paul, I was thinking that a linear regression would be the solution, especially in my case, but I absolutely see how it wouldn't work too well with weaker signals and a median slope fit would work

Today, April 16, 2024 from 09:00 UTC, I will finish transmitting the carrier at 5170.03 Hz. Bernd DL3JMM JO60MR

Bernd wrote: Thanks. Received well in Todmorden as usual, about 60nV/m. For comparison, in January 2023, your 300W carrier (between EbNaut transmissions to North America) was measuring about 270

Today, April 16, 2024, starting at 05:45 UTC, I am transmitting a carrier at 5170.03 Hz. The power is approx. 40W. Bernd DL3JMM JO60MR

With a lot of effort and sweat, I was able to repair the many damaged areas of my earth loop. For a test, I've been sending a carrier on 8270.03 Hz since 15:00 UTC. I'll have it for a few hours send

On Mon, Apr 15, 2024 at 01:01 AM, Paul wrote: A really nice general purpose language is one called Pike, not well known but it's almost

On Sun, Apr 14, 2024 at 10:53 PM, Jonathan wrote: Most "True RMS" and other RMS-measuring volt meters seem to only have accuracy at low frequencies like power line frequencies, so the voltage value at

Picking the central 6 hours of daytime from the first day, from 15:00 to 21:00 the phase goes from -253.78 to -1808.01. Rounding a little, that's -1554.23 degrees in 6 hours; -1554.23/360 cycles

Graham, Most "True RMS" and other RMS-measuring volt meters seem to only have accuracy at low frequencies like power line frequencies, so the voltage value at audio frequencies may not be the most

Paul, Markus, I appreciate this and it certainly is not as complicated as I thought. At vlf44's location in Spring Brook Township, PA, NAA's signal is quite strong. Here are plots from 4/4 and

Paul and Jonathan, Thank you for the replies. I had noted: I was doing some testing using vlfrx-tools and a USB sound card to test it's line/mic inputs and line out with the idea of using it to test